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Finding the Fourth Proportional to 135.83, 203.78 and 66.42

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Solution

The fourth proportional to 135.83, 203.78 and 66.42 is: 99.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.83 : 203.78 = 66.42 : x
  2. Step 2: Convert to fraction form
    135.83/203.78 = 66.42/x
  3. Step 3: Cross multiply
    135.83x = 203.78 × 66.42
  4. Step 4: Simplify right side
    135.83x = 13,534.95
  5. Step 5: Solve for x
    x = 13,534.95/135.83
  6. Step 6: Final answer
    x = 99.65

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