Finding the Fourth Proportional to 102.01, 153.15 and 71.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102.01 : 153.15 = 71.50 : x
2. Step 2: Convert to fraction form
   102.01/153.15 = 71.50/x
3. Step 3: Cross multiply
   102.01x = 153.15 × 71.50
4. Step 4: Simplify right side
   102.01x = 10,950.23
5. Step 5: Solve for x
   x = 10,950.23/102.01
6. Step 6: Final answer
   x = 107.34