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Finding the Third Proportional to 71,260 and 156,740

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Solution

The third proportional to 71,260 and 156,740 is: 344,757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,260 : 156,740 = 156,740 : x
  2. Step 2: Convert to fraction form
    71,260/156,740 = 156,740/x
  3. Step 3: Cross multiply
    71,260x = 156,740 × 156,740
  4. Step 4: Simplify right side
    71,260x = 24,567,427,600
  5. Step 5: Solve for x
    x = 24,567,427,600/71,260
  6. Step 6: Final answer
    x = 344,757.61

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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.