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Finding the Fourth Proportional to 139.99, 193.18 and 90.96

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Solution

The fourth proportional to 139.99, 193.18 and 90.96 is: 125.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.99 : 193.18 = 90.96 : x
  2. Step 2: Convert to fraction form
    139.99/193.18 = 90.96/x
  3. Step 3: Cross multiply
    139.99x = 193.18 × 90.96
  4. Step 4: Simplify right side
    139.99x = 17,571.20
  5. Step 5: Solve for x
    x = 17,571.20/139.99
  6. Step 6: Final answer
    x = 125.52

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