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Finding the Third Proportional to 20,155 and 43,387

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Solution

The third proportional to 20,155 and 43,387 is: 93,397.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155 : 43,387 = 43,387 : x
  2. Step 2: Convert to fraction form
    20,155/43,387 = 43,387/x
  3. Step 3: Cross multiply
    20,155x = 43,387 × 43,387
  4. Step 4: Simplify right side
    20,155x = 1,882,431,769
  5. Step 5: Solve for x
    x = 1,882,431,769/20,155
  6. Step 6: Final answer
    x = 93,397.76

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.