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Finding the Fourth Proportional to 72,478.95, 100,021.76 and 40,214.15

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Solution

The fourth proportional to 72,478.95, 100,021.76 and 40,214.15 is: 55,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,478.95 : 100,021.76 = 40,214.15 : x
  2. Step 2: Convert to fraction form
    72,478.95/100,021.76 = 40,214.15/x
  3. Step 3: Cross multiply
    72,478.95x = 100,021.76 × 40,214.15
  4. Step 4: Simplify right side
    72,478.95x = 4,022,290,059.90
  5. Step 5: Solve for x
    x = 4,022,290,059.90/72,478.95
  6. Step 6: Final answer
    x = 55,495.98

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