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Finding the Fourth Proportional to 217,630.78, 326,382.87 and 91,267.66

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Solution

The fourth proportional to 217,630.78, 326,382.87 and 91,267.66 is: 136,874.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,630.78 : 326,382.87 = 91,267.66 : x
  2. Step 2: Convert to fraction form
    217,630.78/326,382.87 = 91,267.66/x
  3. Step 3: Cross multiply
    217,630.78x = 326,382.87 × 91,267.66
  4. Step 4: Simplify right side
    217,630.78x = 29,788,200,808.98
  5. Step 5: Solve for x
    x = 29,788,200,808.98/217,630.78
  6. Step 6: Final answer
    x = 136,874.94

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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.