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Finding the Third Proportional to 36,489 and 77,687

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Solution

The third proportional to 36,489 and 77,687 is: 165,399.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,489 : 77,687 = 77,687 : x
  2. Step 2: Convert to fraction form
    36,489/77,687 = 77,687/x
  3. Step 3: Cross multiply
    36,489x = 77,687 × 77,687
  4. Step 4: Simplify right side
    36,489x = 6,035,269,969
  5. Step 5: Solve for x
    x = 6,035,269,969/36,489
  6. Step 6: Final answer
    x = 165,399.71

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.