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Finding the Third Proportional to 78,631 and 171,086

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Solution

The third proportional to 78,631 and 171,086 is: 372,250.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631 : 171,086 = 171,086 : x
  2. Step 2: Convert to fraction form
    78,631/171,086 = 171,086/x
  3. Step 3: Cross multiply
    78,631x = 171,086 × 171,086
  4. Step 4: Simplify right side
    78,631x = 29,270,419,396
  5. Step 5: Solve for x
    x = 29,270,419,396/78,631
  6. Step 6: Final answer
    x = 372,250.38

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.