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Finding the Third Proportional to 80,921 and 122,475

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Solution

The third proportional to 80,921 and 122,475 is: 185,367.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921 : 122,475 = 122,475 : x
  2. Step 2: Convert to fraction form
    80,921/122,475 = 122,475/x
  3. Step 3: Cross multiply
    80,921x = 122,475 × 122,475
  4. Step 4: Simplify right side
    80,921x = 15,000,125,625
  5. Step 5: Solve for x
    x = 15,000,125,625/80,921
  6. Step 6: Final answer
    x = 185,367.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.