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Finding the Fourth Proportional to 79.99, 119.95 and 25.87

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Solution

The fourth proportional to 79.99, 119.95 and 25.87 is: 38.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.99 : 119.95 = 25.87 : x
  2. Step 2: Convert to fraction form
    79.99/119.95 = 25.87/x
  3. Step 3: Cross multiply
    79.99x = 119.95 × 25.87
  4. Step 4: Simplify right side
    79.99x = 3,103.11
  5. Step 5: Solve for x
    x = 3,103.11/79.99
  6. Step 6: Final answer
    x = 38.79

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