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Finding the Fourth Proportional to 69,640.17, 104,447.90 and 31,680.60

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Solution

The fourth proportional to 69,640.17, 104,447.90 and 31,680.60 is: 47,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,640.17 : 104,447.90 = 31,680.60 : x
  2. Step 2: Convert to fraction form
    69,640.17/104,447.90 = 31,680.60/x
  3. Step 3: Cross multiply
    69,640.17x = 104,447.90 × 31,680.60
  4. Step 4: Simplify right side
    69,640.17x = 3,308,971,982.34
  5. Step 5: Solve for x
    x = 3,308,971,982.34/69,640.17
  6. Step 6: Final answer
    x = 47,515.28

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