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Finding the Fourth Proportional to 89.94, 134.82 and 79.74

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Solution

The fourth proportional to 89.94, 134.82 and 79.74 is: 119.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.94 : 134.82 = 79.74 : x
  2. Step 2: Convert to fraction form
    89.94/134.82 = 79.74/x
  3. Step 3: Cross multiply
    89.94x = 134.82 × 79.74
  4. Step 4: Simplify right side
    89.94x = 10,750.55
  5. Step 5: Solve for x
    x = 10,750.55/89.94
  6. Step 6: Final answer
    x = 119.53

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