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Finding the Fourth Proportional to 137,300.20, 205,719.90 and 67,028.20

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Solution

The fourth proportional to 137,300.20, 205,719.90 and 67,028.20 is: 100,429.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,300.20 : 205,719.90 = 67,028.20 : x
  2. Step 2: Convert to fraction form
    137,300.20/205,719.90 = 67,028.20/x
  3. Step 3: Cross multiply
    137,300.20x = 205,719.90 × 67,028.20
  4. Step 4: Simplify right side
    137,300.20x = 13,789,034,601.18
  5. Step 5: Solve for x
    x = 13,789,034,601.18/137,300.20
  6. Step 6: Final answer
    x = 100,429.82

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