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Finding the Fourth Proportional to 86,649.75, 129,974.63 and 31,245.75

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Solution

The fourth proportional to 86,649.75, 129,974.63 and 31,245.75 is: 46,868.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,649.75 : 129,974.63 = 31,245.75 : x
  2. Step 2: Convert to fraction form
    86,649.75/129,974.63 = 31,245.75/x
  3. Step 3: Cross multiply
    86,649.75x = 129,974.63 × 31,245.75
  4. Step 4: Simplify right side
    86,649.75x = 4,061,154,639.09
  5. Step 5: Solve for x
    x = 4,061,154,639.09/86,649.75
  6. Step 6: Final answer
    x = 46,868.63

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