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Finding the Fourth Proportional to 91,879.73, 137,824.30 and 25,318.38

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Solution

The fourth proportional to 91,879.73, 137,824.30 and 25,318.38 is: 37,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,879.73 : 137,824.30 = 25,318.38 : x
  2. Step 2: Convert to fraction form
    91,879.73/137,824.30 = 25,318.38/x
  3. Step 3: Cross multiply
    91,879.73x = 137,824.30 × 25,318.38
  4. Step 4: Simplify right side
    91,879.73x = 3,489,488,549.12
  5. Step 5: Solve for x
    x = 3,489,488,549.12/91,879.73
  6. Step 6: Final answer
    x = 37,978.87

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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.