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Finding the Third Proportional to 71,424 and 156,860

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Solution

The third proportional to 71,424 and 156,860 is: 344,492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,424 : 156,860 = 156,860 : x
  2. Step 2: Convert to fraction form
    71,424/156,860 = 156,860/x
  3. Step 3: Cross multiply
    71,424x = 156,860 × 156,860
  4. Step 4: Simplify right side
    71,424x = 24,605,059,600
  5. Step 5: Solve for x
    x = 24,605,059,600/71,424
  6. Step 6: Final answer
    x = 344,492.88

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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.