Let x be the smallest number, and let y and z be the larger numbers....therefore, we have..
(y + z) = 4x
And
x + (y + z) = 85 substitute for (y + z)
x + 4x = 85
5x = 85 divide by 5 on both sides
x = 17
And (y + z) = 4(17) = 68
Unfortunately, we cannot determine the exact values for y and z....there are infinite possibilities.....!!!