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Finding the Fourth Proportional to 100,171.48, 138,236.87 and 54,231.61

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Solution

The fourth proportional to 100,171.48, 138,236.87 and 54,231.61 is: 74,839.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,171.48 : 138,236.87 = 54,231.61 : x
  2. Step 2: Convert to fraction form
    100,171.48/138,236.87 = 54,231.61/x
  3. Step 3: Cross multiply
    100,171.48x = 138,236.87 × 54,231.61
  4. Step 4: Simplify right side
    100,171.48x = 7,496,807,521.76
  5. Step 5: Solve for x
    x = 7,496,807,521.76/100,171.48
  6. Step 6: Final answer
    x = 74,839.74

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