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Finding the Fourth Proportional to 148.39, 222.31 and 79.81

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Solution

The fourth proportional to 148.39, 222.31 and 79.81 is: 119.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.39 : 222.31 = 79.81 : x
  2. Step 2: Convert to fraction form
    148.39/222.31 = 79.81/x
  3. Step 3: Cross multiply
    148.39x = 222.31 × 79.81
  4. Step 4: Simplify right side
    148.39x = 17,742.56
  5. Step 5: Solve for x
    x = 17,742.56/148.39
  6. Step 6: Final answer
    x = 119.57

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