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Finding the Third Proportional to 78,065 and 171,681

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Solution

The third proportional to 78,065 and 171,681 is: 377,561.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,065 : 171,681 = 171,681 : x
  2. Step 2: Convert to fraction form
    78,065/171,681 = 171,681/x
  3. Step 3: Cross multiply
    78,065x = 171,681 × 171,681
  4. Step 4: Simplify right side
    78,065x = 29,474,365,761
  5. Step 5: Solve for x
    x = 29,474,365,761/78,065
  6. Step 6: Final answer
    x = 377,561.85

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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.