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Finding the Fourth Proportional to 159.99, 240.03 and 78.81

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Solution

The fourth proportional to 159.99, 240.03 and 78.81 is: 118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.99 : 240.03 = 78.81 : x
  2. Step 2: Convert to fraction form
    159.99/240.03 = 78.81/x
  3. Step 3: Cross multiply
    159.99x = 240.03 × 78.81
  4. Step 4: Simplify right side
    159.99x = 18,916.76
  5. Step 5: Solve for x
    x = 18,916.76/159.99
  6. Step 6: Final answer
    x = 118.24

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