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Finding the Fourth Proportional to 131.30, 196.95 and 39.99

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Solution

The fourth proportional to 131.30, 196.95 and 39.99 is: 59.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.30 : 196.95 = 39.99 : x
  2. Step 2: Convert to fraction form
    131.30/196.95 = 39.99/x
  3. Step 3: Cross multiply
    131.30x = 196.95 × 39.99
  4. Step 4: Simplify right side
    131.30x = 7,876.72
  5. Step 5: Solve for x
    x = 7,876.72/131.30
  6. Step 6: Final answer
    x = 59.99

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