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Finding the Fourth Proportional to 200,397.78, 276,736.26 and 128,901.92

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Solution

The fourth proportional to 200,397.78, 276,736.26 and 128,901.92 is: 178,005.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,397.78 : 276,736.26 = 128,901.92 : x
  2. Step 2: Convert to fraction form
    200,397.78/276,736.26 = 128,901.92/x
  3. Step 3: Cross multiply
    200,397.78x = 276,736.26 × 128,901.92
  4. Step 4: Simplify right side
    200,397.78x = 35,671,835,247.62
  5. Step 5: Solve for x
    x = 35,671,835,247.62/200,397.78
  6. Step 6: Final answer
    x = 178,005.14

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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.