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Finding the Fourth Proportional to 191,899.92, 287,780.76 and 81,100.56

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Solution

The fourth proportional to 191,899.92, 287,780.76 and 81,100.56 is: 121,621.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,899.92 : 287,780.76 = 81,100.56 : x
  2. Step 2: Convert to fraction form
    191,899.92/287,780.76 = 81,100.56/x
  3. Step 3: Cross multiply
    191,899.92x = 287,780.76 × 81,100.56
  4. Step 4: Simplify right side
    191,899.92x = 23,339,180,793.23
  5. Step 5: Solve for x
    x = 23,339,180,793.23/191,899.92
  6. Step 6: Final answer
    x = 121,621.63

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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.