Hello, thank you for taking the time to post your question!
If the underlying ratio here is 7:8:10 that means that there are 25 total parts, so each part is worth $90,000 / 25 = $3600
From there then you can just multiply by the ratio values
First category: 7 x $3,600 = $25,200
Second category: 8 x $3,600 = $28,800
Third category: 10 x $3,600 = $36,000
So that value represents how much money each category gets
I hope that helps get you moving in the right direction! Feel free to reach out if you have any additional questions beyond that :)
Dattaprabhakar G.
07/30/14