Home / 80,290.16-120,345-38,135.73

Finding the Fourth Proportional to 80,290.16, 120,345 and 38,135.73

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Solution

The fourth proportional to 80,290.16, 120,345 and 38,135.73 is: 57,160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,290.16 : 120,345 = 38,135.73 : x
  2. Step 2: Convert to fraction form
    80,290.16/120,345 = 38,135.73/x
  3. Step 3: Cross multiply
    80,290.16x = 120,345 × 38,135.73
  4. Step 4: Simplify right side
    80,290.16x = 4,589,444,426.85
  5. Step 5: Solve for x
    x = 4,589,444,426.85/80,290.16
  6. Step 6: Final answer
    x = 57,160.74

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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.