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Finding the Fourth Proportional to 209,086.20, 313,629.30 and 51,312.60

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Solution

The fourth proportional to 209,086.20, 313,629.30 and 51,312.60 is: 76,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,086.20 : 313,629.30 = 51,312.60 : x
  2. Step 2: Convert to fraction form
    209,086.20/313,629.30 = 51,312.60/x
  3. Step 3: Cross multiply
    209,086.20x = 313,629.30 × 51,312.60
  4. Step 4: Simplify right side
    209,086.20x = 16,093,134,819.18
  5. Step 5: Solve for x
    x = 16,093,134,819.18/209,086.20
  6. Step 6: Final answer
    x = 76,968.90

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