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Finding the Fourth Proportional to 221,939.52, 332,940.88 and 72,131.64

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Solution

The fourth proportional to 221,939.52, 332,940.88 and 72,131.64 is: 108,207.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,939.52 : 332,940.88 = 72,131.64 : x
  2. Step 2: Convert to fraction form
    221,939.52/332,940.88 = 72,131.64/x
  3. Step 3: Cross multiply
    221,939.52x = 332,940.88 × 72,131.64
  4. Step 4: Simplify right side
    221,939.52x = 24,015,571,697.44
  5. Step 5: Solve for x
    x = 24,015,571,697.44/221,939.52
  6. Step 6: Final answer
    x = 108,207.73

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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.