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Finding the Fourth Proportional to 115.04, 158.66 and 78.14

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Solution

The fourth proportional to 115.04, 158.66 and 78.14 is: 107.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.04 : 158.66 = 78.14 : x
  2. Step 2: Convert to fraction form
    115.04/158.66 = 78.14/x
  3. Step 3: Cross multiply
    115.04x = 158.66 × 78.14
  4. Step 4: Simplify right side
    115.04x = 12,396.51
  5. Step 5: Solve for x
    x = 12,396.51/115.04
  6. Step 6: Final answer
    x = 107.76

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