Finding the Fourth Proportional to 142.73, 196.94 and 83.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142.73 : 196.94 = 83.75 : x
2. Step 2: Convert to fraction form
   142.73/196.94 = 83.75/x
3. Step 3: Cross multiply
   142.73x = 196.94 × 83.75
4. Step 4: Simplify right side
   142.73x = 16,492.32
5. Step 5: Solve for x
   x = 16,492.32/142.73
6. Step 6: Final answer
   x = 115.55