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Finding the Fourth Proportional to 221,910.78, 332,884.50 and 72,147.66

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Solution

The fourth proportional to 221,910.78, 332,884.50 and 72,147.66 is: 108,227.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,910.78 : 332,884.50 = 72,147.66 : x
  2. Step 2: Convert to fraction form
    221,910.78/332,884.50 = 72,147.66/x
  3. Step 3: Cross multiply
    221,910.78x = 332,884.50 × 72,147.66
  4. Step 4: Simplify right side
    221,910.78x = 24,016,837,725.27
  5. Step 5: Solve for x
    x = 24,016,837,725.27/221,910.78
  6. Step 6: Final answer
    x = 108,227.45

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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.