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Finding the Fourth Proportional to 78,144.56, 117,215.20 and 18,980.52

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Solution

The fourth proportional to 78,144.56, 117,215.20 and 18,980.52 is: 28,470.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,144.56 : 117,215.20 = 18,980.52 : x
  2. Step 2: Convert to fraction form
    78,144.56/117,215.20 = 18,980.52/x
  3. Step 3: Cross multiply
    78,144.56x = 117,215.20 × 18,980.52
  4. Step 4: Simplify right side
    78,144.56x = 2,224,805,447.90
  5. Step 5: Solve for x
    x = 2,224,805,447.90/78,144.56
  6. Step 6: Final answer
    x = 28,470.38

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