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Finding the Fourth Proportional to 70,991.64, 106,472.42 and 26,621.66

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Solution

The fourth proportional to 70,991.64, 106,472.42 and 26,621.66 is: 39,926.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,991.64 : 106,472.42 = 26,621.66 : x
  2. Step 2: Convert to fraction form
    70,991.64/106,472.42 = 26,621.66/x
  3. Step 3: Cross multiply
    70,991.64x = 106,472.42 × 26,621.66
  4. Step 4: Simplify right side
    70,991.64x = 2,834,472,947.27
  5. Step 5: Solve for x
    x = 2,834,472,947.27/70,991.64
  6. Step 6: Final answer
    x = 39,926.86

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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.