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Finding the Fourth Proportional to 70,712.88, 105,879.72 and 37,363.68

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Solution

The fourth proportional to 70,712.88, 105,879.72 and 37,363.68 is: 55,945.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,712.88 : 105,879.72 = 37,363.68 : x
  2. Step 2: Convert to fraction form
    70,712.88/105,879.72 = 37,363.68/x
  3. Step 3: Cross multiply
    70,712.88x = 105,879.72 × 37,363.68
  4. Step 4: Simplify right side
    70,712.88x = 3,956,055,976.57
  5. Step 5: Solve for x
    x = 3,956,055,976.57/70,712.88
  6. Step 6: Final answer
    x = 55,945.34

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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.