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Finding the Third Proportional to 80,640.50 and 124,655

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Solution

The third proportional to 80,640.50 and 124,655 is: 192,693.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.50 : 124,655 = 124,655 : x
  2. Step 2: Convert to fraction form
    80,640.50/124,655 = 124,655/x
  3. Step 3: Cross multiply
    80,640.50x = 124,655 × 124,655
  4. Step 4: Simplify right side
    80,640.50x = 15,538,869,025
  5. Step 5: Solve for x
    x = 15,538,869,025/80,640.50
  6. Step 6: Final answer
    x = 192,693.11

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.