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Finding the Fourth Proportional to 61,912.67, 85,438.73 and 33,618.56

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Solution

The fourth proportional to 61,912.67, 85,438.73 and 33,618.56 is: 46,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,912.67 : 85,438.73 = 33,618.56 : x
  2. Step 2: Convert to fraction form
    61,912.67/85,438.73 = 33,618.56/x
  3. Step 3: Cross multiply
    61,912.67x = 85,438.73 × 33,618.56
  4. Step 4: Simplify right side
    61,912.67x = 2,872,326,727.68
  5. Step 5: Solve for x
    x = 2,872,326,727.68/61,912.67
  6. Step 6: Final answer
    x = 46,393.20

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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.