Home / 87,631.20-131,446.80-56,138.40

Finding the Fourth Proportional to 87,631.20, 131,446.80 and 56,138.40

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Solution

The fourth proportional to 87,631.20, 131,446.80 and 56,138.40 is: 84,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,631.20 : 131,446.80 = 56,138.40 : x
  2. Step 2: Convert to fraction form
    87,631.20/131,446.80 = 56,138.40/x
  3. Step 3: Cross multiply
    87,631.20x = 131,446.80 × 56,138.40
  4. Step 4: Simplify right side
    87,631.20x = 7,379,213,037.12
  5. Step 5: Solve for x
    x = 7,379,213,037.12/87,631.20
  6. Step 6: Final answer
    x = 84,207.60

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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.