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Finding the Third Proportional to 66,940 and 145,542

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Solution

The third proportional to 66,940 and 145,542 is: 316,439.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940 : 145,542 = 145,542 : x
  2. Step 2: Convert to fraction form
    66,940/145,542 = 145,542/x
  3. Step 3: Cross multiply
    66,940x = 145,542 × 145,542
  4. Step 4: Simplify right side
    66,940x = 21,182,473,764
  5. Step 5: Solve for x
    x = 21,182,473,764/66,940
  6. Step 6: Final answer
    x = 316,439.70

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.