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Finding the Fourth Proportional to 80,488.78, 120,733.07 and 30,568.78

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Solution

The fourth proportional to 80,488.78, 120,733.07 and 30,568.78 is: 45,853.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,488.78 : 120,733.07 = 30,568.78 : x
  2. Step 2: Convert to fraction form
    80,488.78/120,733.07 = 30,568.78/x
  3. Step 3: Cross multiply
    80,488.78x = 120,733.07 × 30,568.78
  4. Step 4: Simplify right side
    80,488.78x = 3,690,662,502.71
  5. Step 5: Solve for x
    x = 3,690,662,502.71/80,488.78
  6. Step 6: Final answer
    x = 45,853.13

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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.