Home / 87,621.80-131,432.70-40,879.40

Finding the Fourth Proportional to 87,621.80, 131,432.70 and 40,879.40

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Solution

The fourth proportional to 87,621.80, 131,432.70 and 40,879.40 is: 61,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,621.80 : 131,432.70 = 40,879.40 : x
  2. Step 2: Convert to fraction form
    87,621.80/131,432.70 = 40,879.40/x
  3. Step 3: Cross multiply
    87,621.80x = 131,432.70 × 40,879.40
  4. Step 4: Simplify right side
    87,621.80x = 5,372,889,916.38
  5. Step 5: Solve for x
    x = 5,372,889,916.38/87,621.80
  6. Step 6: Final answer
    x = 61,319.10

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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.