Home / 80,387.40-120,513.06-30,439.97

Finding the Fourth Proportional to 80,387.40, 120,513.06 and 30,439.97

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Solution

The fourth proportional to 80,387.40, 120,513.06 and 30,439.97 is: 45,634.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,387.40 : 120,513.06 = 30,439.97 : x
  2. Step 2: Convert to fraction form
    80,387.40/120,513.06 = 30,439.97/x
  3. Step 3: Cross multiply
    80,387.40x = 120,513.06 × 30,439.97
  4. Step 4: Simplify right side
    80,387.40x = 3,668,413,328.44
  5. Step 5: Solve for x
    x = 3,668,413,328.44/80,387.40
  6. Step 6: Final answer
    x = 45,634.18

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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.