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Finding the Third Proportional to 39,918 and 63,279

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Solution

The third proportional to 39,918 and 63,279 is: 100,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,918 : 63,279 = 63,279 : x
  2. Step 2: Convert to fraction form
    39,918/63,279 = 63,279/x
  3. Step 3: Cross multiply
    39,918x = 63,279 × 63,279
  4. Step 4: Simplify right side
    39,918x = 4,004,231,841
  5. Step 5: Solve for x
    x = 4,004,231,841/39,918
  6. Step 6: Final answer
    x = 100,311.43

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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.