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Finding the Third Proportional to 87,311 and 129,328

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Solution

The third proportional to 87,311 and 129,328 is: 191,565.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311 : 129,328 = 129,328 : x
  2. Step 2: Convert to fraction form
    87,311/129,328 = 129,328/x
  3. Step 3: Cross multiply
    87,311x = 129,328 × 129,328
  4. Step 4: Simplify right side
    87,311x = 16,725,731,584
  5. Step 5: Solve for x
    x = 16,725,731,584/87,311
  6. Step 6: Final answer
    x = 191,565.00

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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.