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Finding the Fourth Proportional to 70,227.65, 96,890.42 and 39,991.53

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Solution

The fourth proportional to 70,227.65, 96,890.42 and 39,991.53 is: 55,174.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,227.65 : 96,890.42 = 39,991.53 : x
  2. Step 2: Convert to fraction form
    70,227.65/96,890.42 = 39,991.53/x
  3. Step 3: Cross multiply
    70,227.65x = 96,890.42 × 39,991.53
  4. Step 4: Simplify right side
    70,227.65x = 3,874,795,938.18
  5. Step 5: Solve for x
    x = 3,874,795,938.18/70,227.65
  6. Step 6: Final answer
    x = 55,174.79

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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.