Home / 87,621.10-131,431.65-54,378.70

Finding the Fourth Proportional to 87,621.10, 131,431.65 and 54,378.70

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Solution

The fourth proportional to 87,621.10, 131,431.65 and 54,378.70 is: 81,568.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,621.10 : 131,431.65 = 54,378.70 : x
  2. Step 2: Convert to fraction form
    87,621.10/131,431.65 = 54,378.70/x
  3. Step 3: Cross multiply
    87,621.10x = 131,431.65 × 54,378.70
  4. Step 4: Simplify right side
    87,621.10x = 7,147,082,265.86
  5. Step 5: Solve for x
    x = 7,147,082,265.86/87,621.10
  6. Step 6: Final answer
    x = 81,568.05

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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.