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Finding the Fourth Proportional to 71,978.09, 99,325.26 and 39,713.09

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Solution

The fourth proportional to 71,978.09, 99,325.26 and 39,713.09 is: 54,801.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,978.09 : 99,325.26 = 39,713.09 : x
  2. Step 2: Convert to fraction form
    71,978.09/99,325.26 = 39,713.09/x
  3. Step 3: Cross multiply
    71,978.09x = 99,325.26 × 39,713.09
  4. Step 4: Simplify right side
    71,978.09x = 3,944,512,989.65
  5. Step 5: Solve for x
    x = 3,944,512,989.65/71,978.09
  6. Step 6: Final answer
    x = 54,801.58

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