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Finding the Fourth Proportional to 217,676.92, 326,641.46 and 91,305.88

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Solution

The fourth proportional to 217,676.92, 326,641.46 and 91,305.88 is: 137,011.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,676.92 : 326,641.46 = 91,305.88 : x
  2. Step 2: Convert to fraction form
    217,676.92/326,641.46 = 91,305.88/x
  3. Step 3: Cross multiply
    217,676.92x = 326,641.46 × 91,305.88
  4. Step 4: Simplify right side
    217,676.92x = 29,824,285,949.78
  5. Step 5: Solve for x
    x = 29,824,285,949.78/217,676.92
  6. Step 6: Final answer
    x = 137,011.71

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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.