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Finding the Fourth Proportional to 139.95, 209.97 and 96.66

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Solution

The fourth proportional to 139.95, 209.97 and 96.66 is: 145.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.95 : 209.97 = 96.66 : x
  2. Step 2: Convert to fraction form
    139.95/209.97 = 96.66/x
  3. Step 3: Cross multiply
    139.95x = 209.97 × 96.66
  4. Step 4: Simplify right side
    139.95x = 20,295.70
  5. Step 5: Solve for x
    x = 20,295.70/139.95
  6. Step 6: Final answer
    x = 145.02

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