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Finding the Fourth Proportional to 203.52, 305.22 and 81.81

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Solution

The fourth proportional to 203.52, 305.22 and 81.81 is: 122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.52 : 305.22 = 81.81 : x
  2. Step 2: Convert to fraction form
    203.52/305.22 = 81.81/x
  3. Step 3: Cross multiply
    203.52x = 305.22 × 81.81
  4. Step 4: Simplify right side
    203.52x = 24,970.05
  5. Step 5: Solve for x
    x = 24,970.05/203.52
  6. Step 6: Final answer
    x = 122.69

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