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Finding the Third Proportional to 107,921 and 163,387

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Solution

The third proportional to 107,921 and 163,387 is: 247,359.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,921 : 163,387 = 163,387 : x
  2. Step 2: Convert to fraction form
    107,921/163,387 = 163,387/x
  3. Step 3: Cross multiply
    107,921x = 163,387 × 163,387
  4. Step 4: Simplify right side
    107,921x = 26,695,311,769
  5. Step 5: Solve for x
    x = 26,695,311,769/107,921
  6. Step 6: Final answer
    x = 247,359.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.