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Finding the Third Proportional to 38,460 and 82,872

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Solution

The third proportional to 38,460 and 82,872 is: 178,569.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,460 : 82,872 = 82,872 : x
  2. Step 2: Convert to fraction form
    38,460/82,872 = 82,872/x
  3. Step 3: Cross multiply
    38,460x = 82,872 × 82,872
  4. Step 4: Simplify right side
    38,460x = 6,867,768,384
  5. Step 5: Solve for x
    x = 6,867,768,384/38,460
  6. Step 6: Final answer
    x = 178,569.12

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.