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Finding the Fourth Proportional to 231.92, 347.76 and 87.54

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Solution

The fourth proportional to 231.92, 347.76 and 87.54 is: 131.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.92 : 347.76 = 87.54 : x
  2. Step 2: Convert to fraction form
    231.92/347.76 = 87.54/x
  3. Step 3: Cross multiply
    231.92x = 347.76 × 87.54
  4. Step 4: Simplify right side
    231.92x = 30,442.91
  5. Step 5: Solve for x
    x = 30,442.91/231.92
  6. Step 6: Final answer
    x = 131.26

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