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Finding the Fourth Proportional to 203,818.72, 305,747.52 and 79,169.44

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Solution

The fourth proportional to 203,818.72, 305,747.52 and 79,169.44 is: 118,761.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,818.72 : 305,747.52 = 79,169.44 : x
  2. Step 2: Convert to fraction form
    203,818.72/305,747.52 = 79,169.44/x
  3. Step 3: Cross multiply
    203,818.72x = 305,747.52 × 79,169.44
  4. Step 4: Simplify right side
    203,818.72x = 24,205,859,939.79
  5. Step 5: Solve for x
    x = 24,205,859,939.79/203,818.72
  6. Step 6: Final answer
    x = 118,761.71

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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.