Finding the Third Proportional to 71.25 and 105.75

Step by Step Solution

1. Step 1: Write the proportion equation
   71.25 : 105.75 = 105.75 : x
2. Step 2: Convert to fraction form
   71.25/105.75 = 105.75/x
3. Step 3: Cross multiply
   71.25x = 105.75 × 105.75
4. Step 4: Simplify right side
   71.25x = 11,183.06
5. Step 5: Solve for x
   x = 11,183.06/71.25
6. Step 6: Final answer
   x = 156.96