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Finding the Fourth Proportional to 100,396.73, 138,545.08 and 55,074.31

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Solution

The fourth proportional to 100,396.73, 138,545.08 and 55,074.31 is: 76,001.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,396.73 : 138,545.08 = 55,074.31 : x
  2. Step 2: Convert to fraction form
    100,396.73/138,545.08 = 55,074.31/x
  3. Step 3: Cross multiply
    100,396.73x = 138,545.08 × 55,074.31
  4. Step 4: Simplify right side
    100,396.73x = 7,630,274,200.85
  5. Step 5: Solve for x
    x = 7,630,274,200.85/100,396.73
  6. Step 6: Final answer
    x = 76,001.22

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