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Finding the Fourth Proportional to 128,729,978.60, 192,945,668.70 and 52,002,631.40

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Solution

The fourth proportional to 128,729,978.60, 192,945,668.70 and 52,002,631.40 is: 77,943,635.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,729,978.60 : 192,945,668.70 = 52,002,631.40 : x
  2. Step 2: Convert to fraction form
    128,729,978.60/192,945,668.70 = 52,002,631.40/x
  3. Step 3: Cross multiply
    128,729,978.60x = 192,945,668.70 × 52,002,631.40
  4. Step 4: Simplify right side
    128,729,978.60x = 10,033,682,489,632,616
  5. Step 5: Solve for x
    x = 10,033,682,489,632,616/128,729,978.60
  6. Step 6: Final answer
    x = 77,943,635.19

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