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Finding the Fourth Proportional to 311,903.20, 468,016.80 and 145,691.20

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Solution

The fourth proportional to 311,903.20, 468,016.80 and 145,691.20 is: 218,612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,903.20 : 468,016.80 = 145,691.20 : x
  2. Step 2: Convert to fraction form
    311,903.20/468,016.80 = 145,691.20/x
  3. Step 3: Cross multiply
    311,903.20x = 468,016.80 × 145,691.20
  4. Step 4: Simplify right side
    311,903.20x = 68,185,929,212.16
  5. Step 5: Solve for x
    x = 68,185,929,212.16/311,903.20
  6. Step 6: Final answer
    x = 218,612.47

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