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Finding the Third Proportional to 71,421 and 156,944

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Solution

The third proportional to 71,421 and 156,944 is: 344,876.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,421 : 156,944 = 156,944 : x
  2. Step 2: Convert to fraction form
    71,421/156,944 = 156,944/x
  3. Step 3: Cross multiply
    71,421x = 156,944 × 156,944
  4. Step 4: Simplify right side
    71,421x = 24,631,419,136
  5. Step 5: Solve for x
    x = 24,631,419,136/71,421
  6. Step 6: Final answer
    x = 344,876.42

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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.