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Finding the Third Proportional to 71,711 and 157,720

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Solution

The third proportional to 71,711 and 157,720 is: 346,886.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,711 : 157,720 = 157,720 : x
  2. Step 2: Convert to fraction form
    71,711/157,720 = 157,720/x
  3. Step 3: Cross multiply
    71,711x = 157,720 × 157,720
  4. Step 4: Simplify right side
    71,711x = 24,875,598,400
  5. Step 5: Solve for x
    x = 24,875,598,400/71,711
  6. Step 6: Final answer
    x = 346,886.79

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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.