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Finding the Fourth Proportional to 191,644, 287,170.28 and 121,375.70

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Solution

The fourth proportional to 191,644, 287,170.28 and 121,375.70 is: 181,876.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,644 : 287,170.28 = 121,375.70 : x
  2. Step 2: Convert to fraction form
    191,644/287,170.28 = 121,375.70/x
  3. Step 3: Cross multiply
    191,644x = 287,170.28 × 121,375.70
  4. Step 4: Simplify right side
    191,644x = 34,855,493,754.20
  5. Step 5: Solve for x
    x = 34,855,493,754.20/191,644
  6. Step 6: Final answer
    x = 181,876.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.