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Finding the Third Proportional to 71,381 and 156,885

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Solution

The third proportional to 71,381 and 156,885 is: 344,810.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,381 : 156,885 = 156,885 : x
  2. Step 2: Convert to fraction form
    71,381/156,885 = 156,885/x
  3. Step 3: Cross multiply
    71,381x = 156,885 × 156,885
  4. Step 4: Simplify right side
    71,381x = 24,612,903,225
  5. Step 5: Solve for x
    x = 24,612,903,225/71,381
  6. Step 6: Final answer
    x = 344,810.29

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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.