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Finding the Fourth Proportional to 142,369.20, 196,470.72 and 78,709.68

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Solution

The fourth proportional to 142,369.20, 196,470.72 and 78,709.68 is: 108,620.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,369.20 : 196,470.72 = 78,709.68 : x
  2. Step 2: Convert to fraction form
    142,369.20/196,470.72 = 78,709.68/x
  3. Step 3: Cross multiply
    142,369.20x = 196,470.72 × 78,709.68
  4. Step 4: Simplify right side
    142,369.20x = 15,464,147,500.57
  5. Step 5: Solve for x
    x = 15,464,147,500.57/142,369.20
  6. Step 6: Final answer
    x = 108,620.04

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