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Finding the Fourth Proportional to 200,391.77, 276,727.97 and 128,895.91

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Solution

The fourth proportional to 200,391.77, 276,727.97 and 128,895.91 is: 177,996.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,391.77 : 276,727.97 = 128,895.91 : x
  2. Step 2: Convert to fraction form
    200,391.77/276,727.97 = 128,895.91/x
  3. Step 3: Cross multiply
    200,391.77x = 276,727.97 × 128,895.91
  4. Step 4: Simplify right side
    200,391.77x = 35,669,103,515.60
  5. Step 5: Solve for x
    x = 35,669,103,515.60/200,391.77
  6. Step 6: Final answer
    x = 177,996.85

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1.5x scale

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.