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Finding the Third Proportional to 81,865 and 122,291

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Solution

The third proportional to 81,865 and 122,291 is: 182,679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,865 : 122,291 = 122,291 : x
  2. Step 2: Convert to fraction form
    81,865/122,291 = 122,291/x
  3. Step 3: Cross multiply
    81,865x = 122,291 × 122,291
  4. Step 4: Simplify right side
    81,865x = 14,955,088,681
  5. Step 5: Solve for x
    x = 14,955,088,681/81,865
  6. Step 6: Final answer
    x = 182,679.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.