Home / 80,641.35-121,046.06-78,832.13

Finding the Fourth Proportional to 80,641.35, 121,046.06 and 78,832.13

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Solution

The fourth proportional to 80,641.35, 121,046.06 and 78,832.13 is: 118,330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,641.35 : 121,046.06 = 78,832.13 : x
  2. Step 2: Convert to fraction form
    80,641.35/121,046.06 = 78,832.13/x
  3. Step 3: Cross multiply
    80,641.35x = 121,046.06 × 78,832.13
  4. Step 4: Simplify right side
    80,641.35x = 9,542,317,738.52
  5. Step 5: Solve for x
    x = 9,542,317,738.52/80,641.35
  6. Step 6: Final answer
    x = 118,330.33

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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.