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Finding the Third Proportional to 39,739 and 85,931

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Solution

The third proportional to 39,739 and 85,931 is: 185,815.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,739 : 85,931 = 85,931 : x
  2. Step 2: Convert to fraction form
    39,739/85,931 = 85,931/x
  3. Step 3: Cross multiply
    39,739x = 85,931 × 85,931
  4. Step 4: Simplify right side
    39,739x = 7,384,136,761
  5. Step 5: Solve for x
    x = 7,384,136,761/39,739
  6. Step 6: Final answer
    x = 185,815.87

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.