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Finding the Fourth Proportional to 221,953.52, 332,961.88 and 72,145.64

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Solution

The fourth proportional to 221,953.52, 332,961.88 and 72,145.64 is: 108,228.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,953.52 : 332,961.88 = 72,145.64 : x
  2. Step 2: Convert to fraction form
    221,953.52/332,961.88 = 72,145.64/x
  3. Step 3: Cross multiply
    221,953.52x = 332,961.88 × 72,145.64
  4. Step 4: Simplify right side
    221,953.52x = 24,021,747,928.20
  5. Step 5: Solve for x
    x = 24,021,747,928.20/221,953.52
  6. Step 6: Final answer
    x = 108,228.73

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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.