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Finding the Third Proportional to 36,909 and 81,432

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Solution

The third proportional to 36,909 and 81,432 is: 179,662.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,909 : 81,432 = 81,432 : x
  2. Step 2: Convert to fraction form
    36,909/81,432 = 81,432/x
  3. Step 3: Cross multiply
    36,909x = 81,432 × 81,432
  4. Step 4: Simplify right side
    36,909x = 6,631,170,624
  5. Step 5: Solve for x
    x = 6,631,170,624/36,909
  6. Step 6: Final answer
    x = 179,662.70

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.