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Finding the Third Proportional to 21,723 and 45,909

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Solution

The third proportional to 21,723 and 45,909 is: 97,023.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723 : 45,909 = 45,909 : x
  2. Step 2: Convert to fraction form
    21,723/45,909 = 45,909/x
  3. Step 3: Cross multiply
    21,723x = 45,909 × 45,909
  4. Step 4: Simplify right side
    21,723x = 2,107,636,281
  5. Step 5: Solve for x
    x = 2,107,636,281/21,723
  6. Step 6: Final answer
    x = 97,023.26

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.