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Finding the Fourth Proportional to 217,778.60, 326,513.46 and 84,546.56

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Solution

The fourth proportional to 217,778.60, 326,513.46 and 84,546.56 is: 126,759.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,778.60 : 326,513.46 = 84,546.56 : x
  2. Step 2: Convert to fraction form
    217,778.60/326,513.46 = 84,546.56/x
  3. Step 3: Cross multiply
    217,778.60x = 326,513.46 × 84,546.56
  4. Step 4: Simplify right side
    217,778.60x = 27,605,589,836.70
  5. Step 5: Solve for x
    x = 27,605,589,836.70/217,778.60
  6. Step 6: Final answer
    x = 126,759.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.