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Finding the Third Proportional to 87,170 and 122,755

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Solution

The third proportional to 87,170 and 122,755 is: 172,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,170 : 122,755 = 122,755 : x
  2. Step 2: Convert to fraction form
    87,170/122,755 = 122,755/x
  3. Step 3: Cross multiply
    87,170x = 122,755 × 122,755
  4. Step 4: Simplify right side
    87,170x = 15,068,790,025
  5. Step 5: Solve for x
    x = 15,068,790,025/87,170
  6. Step 6: Final answer
    x = 172,866.70

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.