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Finding the Fourth Proportional to 318.05, 476.96 and 112.61

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Solution

The fourth proportional to 318.05, 476.96 and 112.61 is: 168.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.05 : 476.96 = 112.61 : x
  2. Step 2: Convert to fraction form
    318.05/476.96 = 112.61/x
  3. Step 3: Cross multiply
    318.05x = 476.96 × 112.61
  4. Step 4: Simplify right side
    318.05x = 53,710.47
  5. Step 5: Solve for x
    x = 53,710.47/318.05
  6. Step 6: Final answer
    x = 168.87

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