Home / 280,306.12-420,396.06-80,581.96

Finding the Fourth Proportional to 280,306.12, 420,396.06 and 80,581.96

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Solution

The fourth proportional to 280,306.12, 420,396.06 and 80,581.96 is: 120,854.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,306.12 : 420,396.06 = 80,581.96 : x
  2. Step 2: Convert to fraction form
    280,306.12/420,396.06 = 80,581.96/x
  3. Step 3: Cross multiply
    280,306.12x = 420,396.06 × 80,581.96
  4. Step 4: Simplify right side
    280,306.12x = 33,876,338,491.08
  5. Step 5: Solve for x
    x = 33,876,338,491.08/280,306.12
  6. Step 6: Final answer
    x = 120,854.79

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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.