Home / 80,617.20-120,947.66-28,030.78

Finding the Fourth Proportional to 80,617.20, 120,947.66 and 28,030.78

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Solution

The fourth proportional to 80,617.20, 120,947.66 and 28,030.78 is: 42,053.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,617.20 : 120,947.66 = 28,030.78 : x
  2. Step 2: Convert to fraction form
    80,617.20/120,947.66 = 28,030.78/x
  3. Step 3: Cross multiply
    80,617.20x = 120,947.66 × 28,030.78
  4. Step 4: Simplify right side
    80,617.20x = 3,390,257,248.97
  5. Step 5: Solve for x
    x = 3,390,257,248.97/80,617.20
  6. Step 6: Final answer
    x = 42,053.77

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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.