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Finding the Fourth Proportional to 168.04, 251.56 and 86.64

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Solution

The fourth proportional to 168.04, 251.56 and 86.64 is: 129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.04 : 251.56 = 86.64 : x
  2. Step 2: Convert to fraction form
    168.04/251.56 = 86.64/x
  3. Step 3: Cross multiply
    168.04x = 251.56 × 86.64
  4. Step 4: Simplify right side
    168.04x = 21,795.16
  5. Step 5: Solve for x
    x = 21,795.16/168.04
  6. Step 6: Final answer
    x = 129.70

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