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Finding the Fourth Proportional to 71,915.28, 99,243.53 and 40,086.23

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Solution

The fourth proportional to 71,915.28, 99,243.53 and 40,086.23 is: 55,319.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.28 : 99,243.53 = 40,086.23 : x
  2. Step 2: Convert to fraction form
    71,915.28/99,243.53 = 40,086.23/x
  3. Step 3: Cross multiply
    71,915.28x = 99,243.53 × 40,086.23
  4. Step 4: Simplify right side
    71,915.28x = 3,978,298,423.27
  5. Step 5: Solve for x
    x = 3,978,298,423.27/71,915.28
  6. Step 6: Final answer
    x = 55,319.24

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