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Finding the Fourth Proportional to 133.25, 199.62 and 78.98

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Solution

The fourth proportional to 133.25, 199.62 and 78.98 is: 118.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.25 : 199.62 = 78.98 : x
  2. Step 2: Convert to fraction form
    133.25/199.62 = 78.98/x
  3. Step 3: Cross multiply
    133.25x = 199.62 × 78.98
  4. Step 4: Simplify right side
    133.25x = 15,764.99
  5. Step 5: Solve for x
    x = 15,764.99/133.25
  6. Step 6: Final answer
    x = 118.32

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