Home / 80,324.40-120,400.20-30,385.20

Finding the Fourth Proportional to 80,324.40, 120,400.20 and 30,385.20

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Solution

The fourth proportional to 80,324.40, 120,400.20 and 30,385.20 is: 45,545.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,324.40 : 120,400.20 = 30,385.20 : x
  2. Step 2: Convert to fraction form
    80,324.40/120,400.20 = 30,385.20/x
  3. Step 3: Cross multiply
    80,324.40x = 120,400.20 × 30,385.20
  4. Step 4: Simplify right side
    80,324.40x = 3,658,384,157.04
  5. Step 5: Solve for x
    x = 3,658,384,157.04/80,324.40
  6. Step 6: Final answer
    x = 45,545.12

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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.