The ratio of Bryan's to Carl's money is 4 : 7. The ratio of Carl's to Riordan's money is 4 : 5. If Bryan has $272, how much more does Riordan have than Carl?
Bryan |
Carl |
Riordan |
4x4 |
7x4 |
|
|
4x7 |
5x7 |
16 u |
28 u |
35 u |
The amount that Carl has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 4 = 28
Amount that Bryan has = 16 u
16 u = 272
1 u = 272 ÷ 16 = 17
Amount that Riordan has more than Carl
= 35 u - 28 u
= 7 u
= 7 x 17
= $119
Answer(s): $119