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Finding the Third Proportional to 20,861 and 45,872

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Solution

The third proportional to 20,861 and 45,872 is: 100,869.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861 : 45,872 = 45,872 : x
  2. Step 2: Convert to fraction form
    20,861/45,872 = 45,872/x
  3. Step 3: Cross multiply
    20,861x = 45,872 × 45,872
  4. Step 4: Simplify right side
    20,861x = 2,104,240,384
  5. Step 5: Solve for x
    x = 2,104,240,384/20,861
  6. Step 6: Final answer
    x = 100,869.58

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.