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Finding the Third Proportional to 20,872 and 45,692

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Solution

The third proportional to 20,872 and 45,692 is: 100,026.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872 : 45,692 = 45,692 : x
  2. Step 2: Convert to fraction form
    20,872/45,692 = 45,692/x
  3. Step 3: Cross multiply
    20,872x = 45,692 × 45,692
  4. Step 4: Simplify right side
    20,872x = 2,087,758,864
  5. Step 5: Solve for x
    x = 2,087,758,864/20,872
  6. Step 6: Final answer
    x = 100,026.78

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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.