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Finding the Fourth Proportional to 157.79, 218.09 and 118.91

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Solution

The fourth proportional to 157.79, 218.09 and 118.91 is: 164.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.79 : 218.09 = 118.91 : x
  2. Step 2: Convert to fraction form
    157.79/218.09 = 118.91/x
  3. Step 3: Cross multiply
    157.79x = 218.09 × 118.91
  4. Step 4: Simplify right side
    157.79x = 25,932.49
  5. Step 5: Solve for x
    x = 25,932.49/157.79
  6. Step 6: Final answer
    x = 164.35

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