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Finding the Fourth Proportional to 140.64, 193.91 and 91.43

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Solution

The fourth proportional to 140.64, 193.91 and 91.43 is: 126.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.64 : 193.91 = 91.43 : x
  2. Step 2: Convert to fraction form
    140.64/193.91 = 91.43/x
  3. Step 3: Cross multiply
    140.64x = 193.91 × 91.43
  4. Step 4: Simplify right side
    140.64x = 17,729.19
  5. Step 5: Solve for x
    x = 17,729.19/140.64
  6. Step 6: Final answer
    x = 126.06

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