Home / 87,602.20-131,435.70-28,439.80

Finding the Fourth Proportional to 87,602.20, 131,435.70 and 28,439.80

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Solution

The fourth proportional to 87,602.20, 131,435.70 and 28,439.80 is: 42,670.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,602.20 : 131,435.70 = 28,439.80 : x
  2. Step 2: Convert to fraction form
    87,602.20/131,435.70 = 28,439.80/x
  3. Step 3: Cross multiply
    87,602.20x = 131,435.70 × 28,439.80
  4. Step 4: Simplify right side
    87,602.20x = 3,738,005,020.86
  5. Step 5: Solve for x
    x = 3,738,005,020.86/87,602.20
  6. Step 6: Final answer
    x = 42,670.22

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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.