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Finding the Fourth Proportional to 188.56, 283.04 and 85.92

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Solution

The fourth proportional to 188.56, 283.04 and 85.92 is: 128.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.56 : 283.04 = 85.92 : x
  2. Step 2: Convert to fraction form
    188.56/283.04 = 85.92/x
  3. Step 3: Cross multiply
    188.56x = 283.04 × 85.92
  4. Step 4: Simplify right side
    188.56x = 24,318.99
  5. Step 5: Solve for x
    x = 24,318.99/188.56
  6. Step 6: Final answer
    x = 128.97

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