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Finding the Fourth Proportional to 211.82, 317.80 and 67.56

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Solution

The fourth proportional to 211.82, 317.80 and 67.56 is: 101.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.82 : 317.80 = 67.56 : x
  2. Step 2: Convert to fraction form
    211.82/317.80 = 67.56/x
  3. Step 3: Cross multiply
    211.82x = 317.80 × 67.56
  4. Step 4: Simplify right side
    211.82x = 21,470.57
  5. Step 5: Solve for x
    x = 21,470.57/211.82
  6. Step 6: Final answer
    x = 101.36

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