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Finding the Fourth Proportional to 200,389.01, 276,724.17 and 128,893.15

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Solution

The fourth proportional to 200,389.01, 276,724.17 and 128,893.15 is: 177,993.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,389.01 : 276,724.17 = 128,893.15 : x
  2. Step 2: Convert to fraction form
    200,389.01/276,724.17 = 128,893.15/x
  3. Step 3: Cross multiply
    200,389.01x = 276,724.17 × 128,893.15
  4. Step 4: Simplify right side
    200,389.01x = 35,667,849,952.44
  5. Step 5: Solve for x
    x = 35,667,849,952.44/200,389.01
  6. Step 6: Final answer
    x = 177,993.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.