Home / 80,789.14-121,239.05-28,198.62

Finding the Fourth Proportional to 80,789.14, 121,239.05 and 28,198.62

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Solution

The fourth proportional to 80,789.14, 121,239.05 and 28,198.62 is: 42,317.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,789.14 : 121,239.05 = 28,198.62 : x
  2. Step 2: Convert to fraction form
    80,789.14/121,239.05 = 28,198.62/x
  3. Step 3: Cross multiply
    80,789.14x = 121,239.05 × 28,198.62
  4. Step 4: Simplify right side
    80,789.14x = 3,418,773,759.12
  5. Step 5: Solve for x
    x = 3,418,773,759.12/80,789.14
  6. Step 6: Final answer
    x = 42,317.25

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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.