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Finding the Third Proportional to 83,636 and 178,720

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Solution

The third proportional to 83,636 and 178,720 is: 381,902.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,636 : 178,720 = 178,720 : x
  2. Step 2: Convert to fraction form
    83,636/178,720 = 178,720/x
  3. Step 3: Cross multiply
    83,636x = 178,720 × 178,720
  4. Step 4: Simplify right side
    83,636x = 31,940,838,400
  5. Step 5: Solve for x
    x = 31,940,838,400/83,636
  6. Step 6: Final answer
    x = 381,902.99

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.