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Finding the Fourth Proportional to 98,121.28, 147,039.20 and 74,326.72

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Solution

The fourth proportional to 98,121.28, 147,039.20 and 74,326.72 is: 111,381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,121.28 : 147,039.20 = 74,326.72 : x
  2. Step 2: Convert to fraction form
    98,121.28/147,039.20 = 74,326.72/x
  3. Step 3: Cross multiply
    98,121.28x = 147,039.20 × 74,326.72
  4. Step 4: Simplify right side
    98,121.28x = 10,928,941,447.42
  5. Step 5: Solve for x
    x = 10,928,941,447.42/98,121.28
  6. Step 6: Final answer
    x = 111,381.97

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