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Finding the Third Proportional to 39,768 and 86,908

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Solution

The third proportional to 39,768 and 86,908 is: 189,926.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768 : 86,908 = 86,908 : x
  2. Step 2: Convert to fraction form
    39,768/86,908 = 86,908/x
  3. Step 3: Cross multiply
    39,768x = 86,908 × 86,908
  4. Step 4: Simplify right side
    39,768x = 7,553,000,464
  5. Step 5: Solve for x
    x = 7,553,000,464/39,768
  6. Step 6: Final answer
    x = 189,926.59

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.