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Finding the Fourth Proportional to 104.12, 155.92 and 55.88

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Solution

The fourth proportional to 104.12, 155.92 and 55.88 is: 83.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.12 : 155.92 = 55.88 : x
  2. Step 2: Convert to fraction form
    104.12/155.92 = 55.88/x
  3. Step 3: Cross multiply
    104.12x = 155.92 × 55.88
  4. Step 4: Simplify right side
    104.12x = 8,712.81
  5. Step 5: Solve for x
    x = 8,712.81/104.12
  6. Step 6: Final answer
    x = 83.68

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