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Finding the Fourth Proportional to 191,899.87, 287,726.63 and 79,657.56

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Solution

The fourth proportional to 191,899.87, 287,726.63 and 79,657.56 is: 119,435.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,899.87 : 287,726.63 = 79,657.56 : x
  2. Step 2: Convert to fraction form
    191,899.87/287,726.63 = 79,657.56/x
  3. Step 3: Cross multiply
    191,899.87x = 287,726.63 × 79,657.56
  4. Step 4: Simplify right side
    191,899.87x = 22,919,600,894.54
  5. Step 5: Solve for x
    x = 22,919,600,894.54/191,899.87
  6. Step 6: Final answer
    x = 119,435.21

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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.