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Finding the Fourth Proportional to 129.93, 194.86 and 38.60

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Solution

The fourth proportional to 129.93, 194.86 and 38.60 is: 57.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.93 : 194.86 = 38.60 : x
  2. Step 2: Convert to fraction form
    129.93/194.86 = 38.60/x
  3. Step 3: Cross multiply
    129.93x = 194.86 × 38.60
  4. Step 4: Simplify right side
    129.93x = 7,521.60
  5. Step 5: Solve for x
    x = 7,521.60/129.93
  6. Step 6: Final answer
    x = 57.89

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