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Finding the Fourth Proportional to 86,661.24, 129,991.90 and 31,257.24

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Solution

The fourth proportional to 86,661.24, 129,991.90 and 31,257.24 is: 46,885.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,661.24 : 129,991.90 = 31,257.24 : x
  2. Step 2: Convert to fraction form
    86,661.24/129,991.90 = 31,257.24/x
  3. Step 3: Cross multiply
    86,661.24x = 129,991.90 × 31,257.24
  4. Step 4: Simplify right side
    86,661.24x = 4,063,188,016.36
  5. Step 5: Solve for x
    x = 4,063,188,016.36/86,661.24
  6. Step 6: Final answer
    x = 46,885.87

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