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Finding the Third Proportional to 71,916 and 156,809

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Solution

The third proportional to 71,916 and 156,809 is: 341,913.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,916 : 156,809 = 156,809 : x
  2. Step 2: Convert to fraction form
    71,916/156,809 = 156,809/x
  3. Step 3: Cross multiply
    71,916x = 156,809 × 156,809
  4. Step 4: Simplify right side
    71,916x = 24,589,062,481
  5. Step 5: Solve for x
    x = 24,589,062,481/71,916
  6. Step 6: Final answer
    x = 341,913.66

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.