Finding the Third Proportional to 34.50 and 70.50

Step by Step Solution

1. Step 1: Write the proportion equation
   34.50 : 70.50 = 70.50 : x
2. Step 2: Convert to fraction form
   34.50/70.50 = 70.50/x
3. Step 3: Cross multiply
   34.50x = 70.50 × 70.50
4. Step 4: Simplify right side
   34.50x = 4,970.25
5. Step 5: Solve for x
   x = 4,970.25/34.50
6. Step 6: Final answer
   x = 144.07