Home / 87,400.20-130,986.90-40,553.40

Finding the Fourth Proportional to 87,400.20, 130,986.90 and 40,553.40

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Solution

The fourth proportional to 87,400.20, 130,986.90 and 40,553.40 is: 60,777.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,400.20 : 130,986.90 = 40,553.40 : x
  2. Step 2: Convert to fraction form
    87,400.20/130,986.90 = 40,553.40/x
  3. Step 3: Cross multiply
    87,400.20x = 130,986.90 × 40,553.40
  4. Step 4: Simplify right side
    87,400.20x = 5,311,964,150.46
  5. Step 5: Solve for x
    x = 5,311,964,150.46/87,400.20
  6. Step 6: Final answer
    x = 60,777.48

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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.