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Finding the Third Proportional to 87,531 and 128,539.50

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Solution

The third proportional to 87,531 and 128,539.50 is: 188,760.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,531 : 128,539.50 = 128,539.50 : x
  2. Step 2: Convert to fraction form
    87,531/128,539.50 = 128,539.50/x
  3. Step 3: Cross multiply
    87,531x = 128,539.50 × 128,539.50
  4. Step 4: Simplify right side
    87,531x = 16,522,403,060.25
  5. Step 5: Solve for x
    x = 16,522,403,060.25/87,531
  6. Step 6: Final answer
    x = 188,760.59

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.