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Finding the Fourth Proportional to 115,218.01, 158,864.84 and 78,936.85

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Solution

The fourth proportional to 115,218.01, 158,864.84 and 78,936.85 is: 108,839.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,218.01 : 158,864.84 = 78,936.85 : x
  2. Step 2: Convert to fraction form
    115,218.01/158,864.84 = 78,936.85/x
  3. Step 3: Cross multiply
    115,218.01x = 158,864.84 × 78,936.85
  4. Step 4: Simplify right side
    115,218.01x = 12,540,289,251.03
  5. Step 5: Solve for x
    x = 12,540,289,251.03/115,218.01
  6. Step 6: Final answer
    x = 108,839.67

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