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Finding the Fourth Proportional to 70,638.33, 105,993.83 and 39,042.51

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Solution

The fourth proportional to 70,638.33, 105,993.83 and 39,042.51 is: 58,583.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,638.33 : 105,993.83 = 39,042.51 : x
  2. Step 2: Convert to fraction form
    70,638.33/105,993.83 = 39,042.51/x
  3. Step 3: Cross multiply
    70,638.33x = 105,993.83 × 39,042.51
  4. Step 4: Simplify right side
    70,638.33x = 4,138,265,167.71
  5. Step 5: Solve for x
    x = 4,138,265,167.71/70,638.33
  6. Step 6: Final answer
    x = 58,583.85

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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.