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Finding the Fourth Proportional to 100,338.09, 138,472.79 and 55,626.09

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Solution

The fourth proportional to 100,338.09, 138,472.79 and 55,626.09 is: 76,767.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,338.09 : 138,472.79 = 55,626.09 : x
  2. Step 2: Convert to fraction form
    100,338.09/138,472.79 = 55,626.09/x
  3. Step 3: Cross multiply
    100,338.09x = 138,472.79 × 55,626.09
  4. Step 4: Simplify right side
    100,338.09x = 7,702,699,600.96
  5. Step 5: Solve for x
    x = 7,702,699,600.96/100,338.09
  6. Step 6: Final answer
    x = 76,767.45

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