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Finding the Fourth Proportional to 65,908.69, 98,879.89 and 19,161.56

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Solution

The fourth proportional to 65,908.69, 98,879.89 and 19,161.56 is: 28,747.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,908.69 : 98,879.89 = 19,161.56 : x
  2. Step 2: Convert to fraction form
    65,908.69/98,879.89 = 19,161.56/x
  3. Step 3: Cross multiply
    65,908.69x = 98,879.89 × 19,161.56
  4. Step 4: Simplify right side
    65,908.69x = 1,894,693,180.25
  5. Step 5: Solve for x
    x = 1,894,693,180.25/65,908.69
  6. Step 6: Final answer
    x = 28,747.24

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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.