Julie, Sarah and Fiona had a sum of money. The amount of money Julie had was
34 of the amount of money Sarah had. The ratio of the amount of money Sarah had to the total amount of money Fiona and Sarah had was 3: 7. After Fiona gave $44 to Sarah, she had as much money as Sarah. How much more money did Fiona have than Julie in the end?
Julie |
Sarah |
Fiona |
3x3 = 9 u |
4x3 = 12 u |
|
|
3x4 = 12 u |
4x4 = 16 u |
9 u |
12 u |
16 u |
The amount that Sarah had is the repeated identity. Make the amount that Sarah had the same. LCM of 4 and 3 is 12.
|
Julie |
Sarah |
Fiona |
Before |
9 u |
12 u |
16 u |
Change |
No change |
+ 44 |
- 44 |
After |
9 u |
12 u + 44 |
16 u - 44 |
The amount that Fiona and Sarah had in the end is the same.
16 u - 44 = 12 u + 44
16 u - 12 u = 44 + 44
4 u = 88
1 u = 88 ÷ 4 = 22
Amount that Fiona had more than Julie in the end
= 16 u - 44 - 9 u
= 7 u - 44
= 7 x 22 - 44
= 154 - 44
= $110
Answer(s): $110