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Finding the Third Proportional to 87,770 and 135,939

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Solution

The third proportional to 87,770 and 135,939 is: 210,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,770 : 135,939 = 135,939 : x
  2. Step 2: Convert to fraction form
    87,770/135,939 = 135,939/x
  3. Step 3: Cross multiply
    87,770x = 135,939 × 135,939
  4. Step 4: Simplify right side
    87,770x = 18,479,411,721
  5. Step 5: Solve for x
    x = 18,479,411,721/87,770
  6. Step 6: Final answer
    x = 210,543.60

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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.