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Finding the Fourth Proportional to 112.15, 168.41 and 84.73

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Solution

The fourth proportional to 112.15, 168.41 and 84.73 is: 127.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.15 : 168.41 = 84.73 : x
  2. Step 2: Convert to fraction form
    112.15/168.41 = 84.73/x
  3. Step 3: Cross multiply
    112.15x = 168.41 × 84.73
  4. Step 4: Simplify right side
    112.15x = 14,269.49
  5. Step 5: Solve for x
    x = 14,269.49/112.15
  6. Step 6: Final answer
    x = 127.23

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