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Finding the Third Proportional to 77,285 and 162,872

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Solution

The third proportional to 77,285 and 162,872 is: 343,239.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,285 : 162,872 = 162,872 : x
  2. Step 2: Convert to fraction form
    77,285/162,872 = 162,872/x
  3. Step 3: Cross multiply
    77,285x = 162,872 × 162,872
  4. Step 4: Simplify right side
    77,285x = 26,527,288,384
  5. Step 5: Solve for x
    x = 26,527,288,384/77,285
  6. Step 6: Final answer
    x = 343,239.81

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.