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Finding the Fourth Proportional to 218,237.73, 327,436.55 and 91,909.77

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Solution

The fourth proportional to 218,237.73, 327,436.55 and 91,909.77 is: 137,898.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,237.73 : 327,436.55 = 91,909.77 : x
  2. Step 2: Convert to fraction form
    218,237.73/327,436.55 = 91,909.77/x
  3. Step 3: Cross multiply
    218,237.73x = 327,436.55 × 91,909.77
  4. Step 4: Simplify right side
    218,237.73x = 30,094,617,540.54
  5. Step 5: Solve for x
    x = 30,094,617,540.54/218,237.73
  6. Step 6: Final answer
    x = 137,898.33

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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.