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Finding the Fourth Proportional to 120.31, 180.23 and 118.61

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Solution

The fourth proportional to 120.31, 180.23 and 118.61 is: 177.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.31 : 180.23 = 118.61 : x
  2. Step 2: Convert to fraction form
    120.31/180.23 = 118.61/x
  3. Step 3: Cross multiply
    120.31x = 180.23 × 118.61
  4. Step 4: Simplify right side
    120.31x = 21,377.28
  5. Step 5: Solve for x
    x = 21,377.28/120.31
  6. Step 6: Final answer
    x = 177.68

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