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Finding the Fourth Proportional to 200,393.78, 276,730.74 and 128,897.92

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Solution

The fourth proportional to 200,393.78, 276,730.74 and 128,897.92 is: 177,999.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,393.78 : 276,730.74 = 128,897.92 : x
  2. Step 2: Convert to fraction form
    200,393.78/276,730.74 = 128,897.92/x
  3. Step 3: Cross multiply
    200,393.78x = 276,730.74 × 128,897.92
  4. Step 4: Simplify right side
    200,393.78x = 35,670,016,786.06
  5. Step 5: Solve for x
    x = 35,670,016,786.06/200,393.78
  6. Step 6: Final answer
    x = 177,999.62

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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.