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Finding the Fourth Proportional to 112.91, 169.32 and 40.75

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Solution

The fourth proportional to 112.91, 169.32 and 40.75 is: 61.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.91 : 169.32 = 40.75 : x
  2. Step 2: Convert to fraction form
    112.91/169.32 = 40.75/x
  3. Step 3: Cross multiply
    112.91x = 169.32 × 40.75
  4. Step 4: Simplify right side
    112.91x = 6,899.79
  5. Step 5: Solve for x
    x = 6,899.79/112.91
  6. Step 6: Final answer
    x = 61.11

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