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Finding the Fourth Proportional to 71,812.21, 99,104.78 and 39,980.41

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Solution

The fourth proportional to 71,812.21, 99,104.78 and 39,980.41 is: 55,175.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,812.21 : 99,104.78 = 39,980.41 : x
  2. Step 2: Convert to fraction form
    71,812.21/99,104.78 = 39,980.41/x
  3. Step 3: Cross multiply
    71,812.21x = 99,104.78 × 39,980.41
  4. Step 4: Simplify right side
    71,812.21x = 3,962,249,537.46
  5. Step 5: Solve for x
    x = 3,962,249,537.46/71,812.21
  6. Step 6: Final answer
    x = 55,175.15

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