Four brothers invested in a restaurant. One brother invested $140000. Two brothers invested in the ratio x:2x, and the fourth brother invested an amount equal to the three brothers combined. the total investment was $1600000. How much did each brother invest?

Hope its right.

1. What you want to do is do is to know 2x is the ratio and x; $140,000 is the 1 brother investment and total is $1,600,000

2. Put them together 2x (140,000 + x + 2x) = 1600,000

3. 280,000 + 2x + 4x = 1600,000

4. 280,000 + 6x = 1600,000

5 1600,000-280,000 = 1320,000 / 6

6. They each invested $220,000