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Finding the Fourth Proportional to 86,171.88, 118,917.19 and 50,391.95

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Solution

The fourth proportional to 86,171.88, 118,917.19 and 50,391.95 is: 69,540.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,171.88 : 118,917.19 = 50,391.95 : x
  2. Step 2: Convert to fraction form
    86,171.88/118,917.19 = 50,391.95/x
  3. Step 3: Cross multiply
    86,171.88x = 118,917.19 × 50,391.95
  4. Step 4: Simplify right side
    86,171.88x = 5,992,469,092.62
  5. Step 5: Solve for x
    x = 5,992,469,092.62/86,171.88
  6. Step 6: Final answer
    x = 69,540.89

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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.