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Finding the Fourth Proportional to 120.71, 180.93 and 69.38

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Solution

The fourth proportional to 120.71, 180.93 and 69.38 is: 103.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.71 : 180.93 = 69.38 : x
  2. Step 2: Convert to fraction form
    120.71/180.93 = 69.38/x
  3. Step 3: Cross multiply
    120.71x = 180.93 × 69.38
  4. Step 4: Simplify right side
    120.71x = 12,552.12
  5. Step 5: Solve for x
    x = 12,552.12/120.71
  6. Step 6: Final answer
    x = 103.98

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