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Finding the Fourth Proportional to 177, 265.33 and 85.78

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Solution

The fourth proportional to 177, 265.33 and 85.78 is: 128.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    177 : 265.33 = 85.78 : x
  2. Step 2: Convert to fraction form
    177/265.33 = 85.78/x
  3. Step 3: Cross multiply
    177x = 265.33 × 85.78
  4. Step 4: Simplify right side
    177x = 22,760.01
  5. Step 5: Solve for x
    x = 22,760.01/177
  6. Step 6: Final answer
    x = 128.59

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