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Finding the Third Proportional to 72,115 and 156,397

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Solution

The third proportional to 72,115 and 156,397 is: 339,180.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,115 : 156,397 = 156,397 : x
  2. Step 2: Convert to fraction form
    72,115/156,397 = 156,397/x
  3. Step 3: Cross multiply
    72,115x = 156,397 × 156,397
  4. Step 4: Simplify right side
    72,115x = 24,460,021,609
  5. Step 5: Solve for x
    x = 24,460,021,609/72,115
  6. Step 6: Final answer
    x = 339,180.78

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.