Results 1 to 11 of 11

Math Help - Money Proportional Problem

  1. #1
    Newbie
    Joined
    Jun 2011
    Posts
    14

    Money Proportional Problem

    "Moe earns 14 percent more than her husband Joe. Together they make 68000 per year. What is Joe’s annual salary?"

    I wasn't sure if this is a statistic or proportional problem but I'm just unsure on how to go about solving it.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28

    Re: Money Proportional Problem

    Joe's salary is 'x'

    Solve 1.14x+x=68000
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Dec 2009
    Posts
    34

    Re: Money Proportional Problem

    Moe is a girls name!?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Jun 2011
    Posts
    14

    Re: Money Proportional Problem

    Quote Originally Posted by pickslides View Post
    Joe's salary is 'x'

    Solve 1.14x+x=68000
    Oh okay. So that's the same was M + J but you've substituted M with 1.14x which is essentially Joe's salary.

    EDIT: Wait, if the percentage is .14 where did you get the other 100% to get 1.14?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Dec 2009
    Posts
    34

    Re: Money Proportional Problem

    Joes salary is x. Moe makes 14% more than Joe.

    So M = The amount Joe Makes + 14% of the amount Joe makes
    M = x + 0.14x
    M = 1.14x
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    Joined
    May 2010
    Posts
    1,028
    Thanks
    28

    Re: Money Proportional Problem

    If they earned the same, then M's salary would be 100% of J's salary.



    M earns 14% more than joes salary, so we want 100% + 14% = 114%.
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Jun 2011
    Posts
    14

    Re: Money Proportional Problem

    Quote Originally Posted by SpringFan25 View Post
    If they earned the same, then M's salary would be 100% of J's salary.



    M earns 14% more than joes salary, so we want 100% + 14% = 114%.
    Oh, okay I see. The answer I got is: $28333.33 but the online website for my homework wants it in dollars to two significant figures. I try submitting: 2.8x10^4 but it's wrong. I'm not sure why.
    Follow Math Help Forum on Facebook and Google+

  8. #8
    -1
    e^(i*pi)'s Avatar
    Joined
    Feb 2009
    From
    West Midlands, England
    Posts
    3,053
    Thanks
    1

    Re: Money Proportional Problem

    2.8 \cdot 10^4 is only two significant figures.

    Eg: 2.8 is two significant figures whereas 2.80 is three significant figures.

    Edit: Are you sure about that answer? I get something else - Joe's salary which is the question is asking for is x

    edit2: bye bye wrong info
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Newbie
    Joined
    Jun 2011
    Posts
    14

    Re: Money Proportional Problem

    This was my process:

    1.4x + x = 68000
    2.4x = 68000
    x = 28333.333

    And in two sig fig form I got 2.8 x 10^4

    Did I do something wrong in the process?
    Follow Math Help Forum on Facebook and Google+

  10. #10
    -1
    e^(i*pi)'s Avatar
    Joined
    Feb 2009
    From
    West Midlands, England
    Posts
    3,053
    Thanks
    1

    Re: Money Proportional Problem

    Quote Originally Posted by ayyisei View Post
    This was my process:

    1.4x + x = 68000
    2.4x = 68000
    x = 28333.333
    It's 1.14x + x = 2.14x = 68000 instead of 1.4x + x = 68000

    And in two sig fig form I got 2.8 x 10^4

    Did I do something wrong in the process?
    Not here, I misread as 4 sig fig instead of 2. Both 2.8 \cdot 10^4 \text{  and  } 28000 are accurate to 2sf (ignore what I said in my previous post, that only occurs after the decimal point)


    That is two
    Follow Math Help Forum on Facebook and Google+

  11. #11
    Newbie
    Joined
    Jun 2011
    Posts
    14

    Re: Money Proportional Problem

    Yeah. I understand now. I didn't add correctly, haha. I actual answer I got was 31775.70 but 3.2 x 10^4 in sig figs. Thank you!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Not understanding proportional problem..
    Posted in the Algebra Forum
    Replies: 0
    Last Post: July 25th 2011, 04:53 PM
  2. Replies: 5
    Last Post: January 5th 2011, 09:16 PM
  3. directly proportional problem
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: April 27th 2010, 04:13 PM
  4. directly proportional problem
    Posted in the Calculus Forum
    Replies: 0
    Last Post: April 26th 2010, 11:42 AM
  5. proportional math problem
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 13th 2008, 06:38 AM

Search Tags


/mathhelpforum @mathhelpforum