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Finding the Fourth Proportional to 221,906.78, 332,878.49 and 72,143.65

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Solution

The fourth proportional to 221,906.78, 332,878.49 and 72,143.65 is: 108,221.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,906.78 : 332,878.49 = 72,143.65 : x
  2. Step 2: Convert to fraction form
    221,906.78/332,878.49 = 72,143.65/x
  3. Step 3: Cross multiply
    221,906.78x = 332,878.49 × 72,143.65
  4. Step 4: Simplify right side
    221,906.78x = 24,015,069,275.09
  5. Step 5: Solve for x
    x = 24,015,069,275.09/221,906.78
  6. Step 6: Final answer
    x = 108,221.43

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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.