Home / 87,511.92-120,929.94-71,590.56

Finding the Fourth Proportional to 87,511.92, 120,929.94 and 71,590.56

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Solution

The fourth proportional to 87,511.92, 120,929.94 and 71,590.56 is: 98,928.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,511.92 : 120,929.94 = 71,590.56 : x
  2. Step 2: Convert to fraction form
    87,511.92/120,929.94 = 71,590.56/x
  3. Step 3: Cross multiply
    87,511.92x = 120,929.94 × 71,590.56
  4. Step 4: Simplify right side
    87,511.92x = 8,657,442,125.37
  5. Step 5: Solve for x
    x = 8,657,442,125.37/87,511.92
  6. Step 6: Final answer
    x = 98,928.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.