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Finding the Fourth Proportional to 99,906.72, 137,872.32 and 55,194.72

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Solution

The fourth proportional to 99,906.72, 137,872.32 and 55,194.72 is: 76,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,906.72 : 137,872.32 = 55,194.72 : x
  2. Step 2: Convert to fraction form
    99,906.72/137,872.32 = 55,194.72/x
  3. Step 3: Cross multiply
    99,906.72x = 137,872.32 × 55,194.72
  4. Step 4: Simplify right side
    99,906.72x = 7,609,824,098.15
  5. Step 5: Solve for x
    x = 7,609,824,098.15/99,906.72
  6. Step 6: Final answer
    x = 76,169.29

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