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Finding the Fourth Proportional to 90.74, 136.11 and 75.96

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Solution

The fourth proportional to 90.74, 136.11 and 75.96 is: 113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.74 : 136.11 = 75.96 : x
  2. Step 2: Convert to fraction form
    90.74/136.11 = 75.96/x
  3. Step 3: Cross multiply
    90.74x = 136.11 × 75.96
  4. Step 4: Simplify right side
    90.74x = 10,338.92
  5. Step 5: Solve for x
    x = 10,338.92/90.74
  6. Step 6: Final answer
    x = 113.95

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