Home / 278,375.08-417,488.10-78,648.52

Finding the Fourth Proportional to 278,375.08, 417,488.10 and 78,648.52

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Solution

The fourth proportional to 278,375.08, 417,488.10 and 78,648.52 is: 117,951.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,375.08 : 417,488.10 = 78,648.52 : x
  2. Step 2: Convert to fraction form
    278,375.08/417,488.10 = 78,648.52/x
  3. Step 3: Cross multiply
    278,375.08x = 417,488.10 × 78,648.52
  4. Step 4: Simplify right side
    278,375.08x = 32,834,821,182.61
  5. Step 5: Solve for x
    x = 32,834,821,182.61/278,375.08
  6. Step 6: Final answer
    x = 117,951.73

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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.