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Finding the Fourth Proportional to 107.99, 161.95 and 53.87

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Solution

The fourth proportional to 107.99, 161.95 and 53.87 is: 80.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.99 : 161.95 = 53.87 : x
  2. Step 2: Convert to fraction form
    107.99/161.95 = 53.87/x
  3. Step 3: Cross multiply
    107.99x = 161.95 × 53.87
  4. Step 4: Simplify right side
    107.99x = 8,724.25
  5. Step 5: Solve for x
    x = 8,724.25/107.99
  6. Step 6: Final answer
    x = 80.79

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