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Finding the Third Proportional to 39,884 and 81,817

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Solution

The third proportional to 39,884 and 81,817 is: 167,837.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884 : 81,817 = 81,817 : x
  2. Step 2: Convert to fraction form
    39,884/81,817 = 81,817/x
  3. Step 3: Cross multiply
    39,884x = 81,817 × 81,817
  4. Step 4: Simplify right side
    39,884x = 6,694,021,489
  5. Step 5: Solve for x
    x = 6,694,021,489/39,884
  6. Step 6: Final answer
    x = 167,837.27

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.