Home / 87,387.20-131,055.20-31,220.80

Finding the Fourth Proportional to 87,387.20, 131,055.20 and 31,220.80

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Solution

The fourth proportional to 87,387.20, 131,055.20 and 31,220.80 is: 46,822.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,387.20 : 131,055.20 = 31,220.80 : x
  2. Step 2: Convert to fraction form
    87,387.20/131,055.20 = 31,220.80/x
  3. Step 3: Cross multiply
    87,387.20x = 131,055.20 × 31,220.80
  4. Step 4: Simplify right side
    87,387.20x = 4,091,648,188.16
  5. Step 5: Solve for x
    x = 4,091,648,188.16/87,387.20
  6. Step 6: Final answer
    x = 46,822.05

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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.