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Finding the Fourth Proportional to 121,591.56, 167,789.39 and 67,879.97

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Solution

The fourth proportional to 121,591.56, 167,789.39 and 67,879.97 is: 93,670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,591.56 : 167,789.39 = 67,879.97 : x
  2. Step 2: Convert to fraction form
    121,591.56/167,789.39 = 67,879.97/x
  3. Step 3: Cross multiply
    121,591.56x = 167,789.39 × 67,879.97
  4. Step 4: Simplify right side
    121,591.56x = 11,389,538,759.52
  5. Step 5: Solve for x
    x = 11,389,538,759.52/121,591.56
  6. Step 6: Final answer
    x = 93,670.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.