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Finding the Fourth Proportional to 119.12, 178.69 and 58.20

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Solution

The fourth proportional to 119.12, 178.69 and 58.20 is: 87.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.12 : 178.69 = 58.20 : x
  2. Step 2: Convert to fraction form
    119.12/178.69 = 58.20/x
  3. Step 3: Cross multiply
    119.12x = 178.69 × 58.20
  4. Step 4: Simplify right side
    119.12x = 10,399.76
  5. Step 5: Solve for x
    x = 10,399.76/119.12
  6. Step 6: Final answer
    x = 87.31

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