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Finding the Third Proportional to 80,439 and 176,739

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Solution

The third proportional to 80,439 and 176,739 is: 388,327.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,439 : 176,739 = 176,739 : x
  2. Step 2: Convert to fraction form
    80,439/176,739 = 176,739/x
  3. Step 3: Cross multiply
    80,439x = 176,739 × 176,739
  4. Step 4: Simplify right side
    80,439x = 31,236,674,121
  5. Step 5: Solve for x
    x = 31,236,674,121/80,439
  6. Step 6: Final answer
    x = 388,327.48

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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.