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Finding the Fourth Proportional to 129,228.80, 193,710.96 and 44,919.78

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Solution

The fourth proportional to 129,228.80, 193,710.96 and 44,919.78 is: 67,333.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,228.80 : 193,710.96 = 44,919.78 : x
  2. Step 2: Convert to fraction form
    129,228.80/193,710.96 = 44,919.78/x
  3. Step 3: Cross multiply
    129,228.80x = 193,710.96 × 44,919.78
  4. Step 4: Simplify right side
    129,228.80x = 8,701,454,573.36
  5. Step 5: Solve for x
    x = 8,701,454,573.36/129,228.80
  6. Step 6: Final answer
    x = 67,333.71

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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.