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Finding the Fourth Proportional to 198.91, 298.34 and 83.31

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Solution

The fourth proportional to 198.91, 298.34 and 83.31 is: 124.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.91 : 298.34 = 83.31 : x
  2. Step 2: Convert to fraction form
    198.91/298.34 = 83.31/x
  3. Step 3: Cross multiply
    198.91x = 298.34 × 83.31
  4. Step 4: Simplify right side
    198.91x = 24,854.71
  5. Step 5: Solve for x
    x = 24,854.71/198.91
  6. Step 6: Final answer
    x = 124.96

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