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Finding the Fourth Proportional to 80,379.32, 120,559.68 and 21,219.62

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Solution

The fourth proportional to 80,379.32, 120,559.68 and 21,219.62 is: 31,826.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,379.32 : 120,559.68 = 21,219.62 : x
  2. Step 2: Convert to fraction form
    80,379.32/120,559.68 = 21,219.62/x
  3. Step 3: Cross multiply
    80,379.32x = 120,559.68 × 21,219.62
  4. Step 4: Simplify right side
    80,379.32x = 2,558,230,596.92
  5. Step 5: Solve for x
    x = 2,558,230,596.92/80,379.32
  6. Step 6: Final answer
    x = 31,826.97

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1.5x scale

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.