Home / 278,789.32-418,184.31-76,387.15

Finding the Fourth Proportional to 278,789.32, 418,184.31 and 76,387.15

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Solution

The fourth proportional to 278,789.32, 418,184.31 and 76,387.15 is: 114,580.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,789.32 : 418,184.31 = 76,387.15 : x
  2. Step 2: Convert to fraction form
    278,789.32/418,184.31 = 76,387.15/x
  3. Step 3: Cross multiply
    278,789.32x = 418,184.31 × 76,387.15
  4. Step 4: Simplify right side
    278,789.32x = 31,943,907,615.62
  5. Step 5: Solve for x
    x = 31,943,907,615.62/278,789.32
  6. Step 6: Final answer
    x = 114,580.82

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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.