Home / 87,299.91-120,442.32-57,102.48

Finding the Fourth Proportional to 87,299.91, 120,442.32 and 57,102.48

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Solution

The fourth proportional to 87,299.91, 120,442.32 and 57,102.48 is: 78,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,299.91 : 120,442.32 = 57,102.48 : x
  2. Step 2: Convert to fraction form
    87,299.91/120,442.32 = 57,102.48/x
  3. Step 3: Cross multiply
    87,299.91x = 120,442.32 × 57,102.48
  4. Step 4: Simplify right side
    87,299.91x = 6,877,555,168.95
  5. Step 5: Solve for x
    x = 6,877,555,168.95/87,299.91
  6. Step 6: Final answer
    x = 78,780.78

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1.5x scale

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.