Home / 87,478.12-131,221.24-28,318.44

Finding the Fourth Proportional to 87,478.12, 131,221.24 and 28,318.44

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Solution

The fourth proportional to 87,478.12, 131,221.24 and 28,318.44 is: 42,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,478.12 : 131,221.24 = 28,318.44 : x
  2. Step 2: Convert to fraction form
    87,478.12/131,221.24 = 28,318.44/x
  3. Step 3: Cross multiply
    87,478.12x = 131,221.24 × 28,318.44
  4. Step 4: Simplify right side
    87,478.12x = 3,715,980,811.67
  5. Step 5: Solve for x
    x = 3,715,980,811.67/87,478.12
  6. Step 6: Final answer
    x = 42,478.97

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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.