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Finding the Fourth Proportional to 200,534.78, 276,863.83 and 129,039.05

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Solution

The fourth proportional to 200,534.78, 276,863.83 and 129,039.05 is: 178,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,534.78 : 276,863.83 = 129,039.05 : x
  2. Step 2: Convert to fraction form
    200,534.78/276,863.83 = 129,039.05/x
  3. Step 3: Cross multiply
    200,534.78x = 276,863.83 × 129,039.05
  4. Step 4: Simplify right side
    200,534.78x = 35,726,245,602.56
  5. Step 5: Solve for x
    x = 35,726,245,602.56/200,534.78
  6. Step 6: Final answer
    x = 178,154.86

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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.