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Finding the Third Proportional to 41,978 and 66,470

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Solution

The third proportional to 41,978 and 66,470 is: 105,251.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,978 : 66,470 = 66,470 : x
  2. Step 2: Convert to fraction form
    41,978/66,470 = 66,470/x
  3. Step 3: Cross multiply
    41,978x = 66,470 × 66,470
  4. Step 4: Simplify right side
    41,978x = 4,418,260,900
  5. Step 5: Solve for x
    x = 4,418,260,900/41,978
  6. Step 6: Final answer
    x = 105,251.82

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.