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Finding the Third Proportional to 71,486 and 156,985

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Solution

The third proportional to 71,486 and 156,985 is: 344,742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,486 : 156,985 = 156,985 : x
  2. Step 2: Convert to fraction form
    71,486/156,985 = 156,985/x
  3. Step 3: Cross multiply
    71,486x = 156,985 × 156,985
  4. Step 4: Simplify right side
    71,486x = 24,644,290,225
  5. Step 5: Solve for x
    x = 24,644,290,225/71,486
  6. Step 6: Final answer
    x = 344,742.89

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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.