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Finding the Third Proportional to 83,612 and 129,520

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Solution

The third proportional to 83,612 and 129,520 is: 200,634.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,612 : 129,520 = 129,520 : x
  2. Step 2: Convert to fraction form
    83,612/129,520 = 129,520/x
  3. Step 3: Cross multiply
    83,612x = 129,520 × 129,520
  4. Step 4: Simplify right side
    83,612x = 16,775,430,400
  5. Step 5: Solve for x
    x = 16,775,430,400/83,612
  6. Step 6: Final answer
    x = 200,634.24

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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.