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Finding the Third Proportional to 71,389 and 156,934

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Solution

The third proportional to 71,389 and 156,934 is: 344,987.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,389 : 156,934 = 156,934 : x
  2. Step 2: Convert to fraction form
    71,389/156,934 = 156,934/x
  3. Step 3: Cross multiply
    71,389x = 156,934 × 156,934
  4. Step 4: Simplify right side
    71,389x = 24,628,280,356
  5. Step 5: Solve for x
    x = 24,628,280,356/71,389
  6. Step 6: Final answer
    x = 344,987.05

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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.