Home / 76,879.20-115,280.40-35,279.20

Finding the Fourth Proportional to 76,879.20, 115,280.40 and 35,279.20

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Solution

The fourth proportional to 76,879.20, 115,280.40 and 35,279.20 is: 52,901.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,879.20 : 115,280.40 = 35,279.20 : x
  2. Step 2: Convert to fraction form
    76,879.20/115,280.40 = 35,279.20/x
  3. Step 3: Cross multiply
    76,879.20x = 115,280.40 × 35,279.20
  4. Step 4: Simplify right side
    76,879.20x = 4,067,000,287.68
  5. Step 5: Solve for x
    x = 4,067,000,287.68/76,879.20
  6. Step 6: Final answer
    x = 52,901.18

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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.