Home / 87,815.68-132,379.52-80,342.88

Finding the Fourth Proportional to 87,815.68, 132,379.52 and 80,342.88

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Solution

The fourth proportional to 87,815.68, 132,379.52 and 80,342.88 is: 121,114.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,815.68 : 132,379.52 = 80,342.88 : x
  2. Step 2: Convert to fraction form
    87,815.68/132,379.52 = 80,342.88/x
  3. Step 3: Cross multiply
    87,815.68x = 132,379.52 × 80,342.88
  4. Step 4: Simplify right side
    87,815.68x = 10,635,751,889.82
  5. Step 5: Solve for x
    x = 10,635,751,889.82/87,815.68
  6. Step 6: Final answer
    x = 121,114.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.