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Finding the Fourth Proportional to 122.76, 184.20 and 68.70

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Solution

The fourth proportional to 122.76, 184.20 and 68.70 is: 103.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.76 : 184.20 = 68.70 : x
  2. Step 2: Convert to fraction form
    122.76/184.20 = 68.70/x
  3. Step 3: Cross multiply
    122.76x = 184.20 × 68.70
  4. Step 4: Simplify right side
    122.76x = 12,654.54
  5. Step 5: Solve for x
    x = 12,654.54/122.76
  6. Step 6: Final answer
    x = 103.08

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