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Finding the Fourth Proportional to 108.06, 162 and 85.11

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Solution

The fourth proportional to 108.06, 162 and 85.11 is: 127.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.06 : 162 = 85.11 : x
  2. Step 2: Convert to fraction form
    108.06/162 = 85.11/x
  3. Step 3: Cross multiply
    108.06x = 162 × 85.11
  4. Step 4: Simplify right side
    108.06x = 13,787.82
  5. Step 5: Solve for x
    x = 13,787.82/108.06
  6. Step 6: Final answer
    x = 127.59

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