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Finding the Fourth Proportional to 122.43, 183.66 and 81.84

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Solution

The fourth proportional to 122.43, 183.66 and 81.84 is: 122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.43 : 183.66 = 81.84 : x
  2. Step 2: Convert to fraction form
    122.43/183.66 = 81.84/x
  3. Step 3: Cross multiply
    122.43x = 183.66 × 81.84
  4. Step 4: Simplify right side
    122.43x = 15,030.73
  5. Step 5: Solve for x
    x = 15,030.73/122.43
  6. Step 6: Final answer
    x = 122.77

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