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Finding the Third Proportional to 20,887 and 45,909

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Solution

The third proportional to 20,887 and 45,909 is: 100,906.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887 : 45,909 = 45,909 : x
  2. Step 2: Convert to fraction form
    20,887/45,909 = 45,909/x
  3. Step 3: Cross multiply
    20,887x = 45,909 × 45,909
  4. Step 4: Simplify right side
    20,887x = 2,107,636,281
  5. Step 5: Solve for x
    x = 2,107,636,281/20,887
  6. Step 6: Final answer
    x = 100,906.61

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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.