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Finding the Third Proportional to 87,476 and 139,259

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Solution

The third proportional to 87,476 and 139,259 is: 221,695.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,476 : 139,259 = 139,259 : x
  2. Step 2: Convert to fraction form
    87,476/139,259 = 139,259/x
  3. Step 3: Cross multiply
    87,476x = 139,259 × 139,259
  4. Step 4: Simplify right side
    87,476x = 19,393,069,081
  5. Step 5: Solve for x
    x = 19,393,069,081/87,476
  6. Step 6: Final answer
    x = 221,695.88

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.