Finding the Third Proportional to 70.45 and 100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   70.45 : 100.55 = 100.55 : x
2. Step 2: Convert to fraction form
   70.45/100.55 = 100.55/x
3. Step 3: Cross multiply
   70.45x = 100.55 × 100.55
4. Step 4: Simplify right side
   70.45x = 10,109.67
5. Step 5: Solve for x
   x = 10,109.67/70.45
6. Step 6: Final answer
   x = 143.50