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Finding the Fourth Proportional to 39,993.76, 55,161.56 and 35,461.76

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Solution

The fourth proportional to 39,993.76, 55,161.56 and 35,461.76 is: 48,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,993.76 : 55,161.56 = 35,461.76 : x
  2. Step 2: Convert to fraction form
    39,993.76/55,161.56 = 35,461.76/x
  3. Step 3: Cross multiply
    39,993.76x = 55,161.56 × 35,461.76
  4. Step 4: Simplify right side
    39,993.76x = 1,956,126,001.95
  5. Step 5: Solve for x
    x = 1,956,126,001.95/39,993.76
  6. Step 6: Final answer
    x = 48,910.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.