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Finding the Fourth Proportional to 118.53, 177.59 and 79.85

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Solution

The fourth proportional to 118.53, 177.59 and 79.85 is: 119.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.53 : 177.59 = 79.85 : x
  2. Step 2: Convert to fraction form
    118.53/177.59 = 79.85/x
  3. Step 3: Cross multiply
    118.53x = 177.59 × 79.85
  4. Step 4: Simplify right side
    118.53x = 14,181.21
  5. Step 5: Solve for x
    x = 14,181.21/118.53
  6. Step 6: Final answer
    x = 119.64

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