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Finding the Fourth Proportional to 111,939.20, 167,908.80 and 78,696.80

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Solution

The fourth proportional to 111,939.20, 167,908.80 and 78,696.80 is: 118,045.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.20 : 167,908.80 = 78,696.80 : x
  2. Step 2: Convert to fraction form
    111,939.20/167,908.80 = 78,696.80/x
  3. Step 3: Cross multiply
    111,939.20x = 167,908.80 × 78,696.80
  4. Step 4: Simplify right side
    111,939.20x = 13,213,885,251.84
  5. Step 5: Solve for x
    x = 13,213,885,251.84/111,939.20
  6. Step 6: Final answer
    x = 118,045.20

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