Home / 87,282.78-130,942.89-28,121.82

Finding the Fourth Proportional to 87,282.78, 130,942.89 and 28,121.82

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Solution

The fourth proportional to 87,282.78, 130,942.89 and 28,121.82 is: 42,188.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,282.78 : 130,942.89 = 28,121.82 : x
  2. Step 2: Convert to fraction form
    87,282.78/130,942.89 = 28,121.82/x
  3. Step 3: Cross multiply
    87,282.78x = 130,942.89 × 28,121.82
  4. Step 4: Simplify right side
    87,282.78x = 3,682,352,382.86
  5. Step 5: Solve for x
    x = 3,682,352,382.86/87,282.78
  6. Step 6: Final answer
    x = 42,188.76

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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.