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Finding the Fourth Proportional to 139,396.10, 192,367.08 and 78,977.93

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Solution

The fourth proportional to 139,396.10, 192,367.08 and 78,977.93 is: 108,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,396.10 : 192,367.08 = 78,977.93 : x
  2. Step 2: Convert to fraction form
    139,396.10/192,367.08 = 78,977.93/x
  3. Step 3: Cross multiply
    139,396.10x = 192,367.08 × 78,977.93
  4. Step 4: Simplify right side
    139,396.10x = 15,192,752,816.71
  5. Step 5: Solve for x
    x = 15,192,752,816.71/139,396.10
  6. Step 6: Final answer
    x = 108,989.80

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