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Finding the Third Proportional to 87,512 and 129,422

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Solution

The third proportional to 87,512 and 129,422 is: 191,402.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,512 : 129,422 = 129,422 : x
  2. Step 2: Convert to fraction form
    87,512/129,422 = 129,422/x
  3. Step 3: Cross multiply
    87,512x = 129,422 × 129,422
  4. Step 4: Simplify right side
    87,512x = 16,750,054,084
  5. Step 5: Solve for x
    x = 16,750,054,084/87,512
  6. Step 6: Final answer
    x = 191,402.94

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.