Finding the Third Proportional to 71.30 and 153.49

Step by Step Solution

1. Step 1: Write the proportion equation
   71.30 : 153.49 = 153.49 : x
2. Step 2: Convert to fraction form
   71.30/153.49 = 153.49/x
3. Step 3: Cross multiply
   71.30x = 153.49 × 153.49
4. Step 4: Simplify right side
   71.30x = 23,559.85
5. Step 5: Solve for x
   x = 23,559.85/71.30
6. Step 6: Final answer
   x = 330.45