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Finding the Fourth Proportional to 197.12, 295.85 and 128.43

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Solution

The fourth proportional to 197.12, 295.85 and 128.43 is: 192.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.12 : 295.85 = 128.43 : x
  2. Step 2: Convert to fraction form
    197.12/295.85 = 128.43/x
  3. Step 3: Cross multiply
    197.12x = 295.85 × 128.43
  4. Step 4: Simplify right side
    197.12x = 37,995.37
  5. Step 5: Solve for x
    x = 37,995.37/197.12
  6. Step 6: Final answer
    x = 192.76

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