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Finding the Fourth Proportional to 61,912.68, 85,439.84 and 33,618.36

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Solution

The fourth proportional to 61,912.68, 85,439.84 and 33,618.36 is: 46,393.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,912.68 : 85,439.84 = 33,618.36 : x
  2. Step 2: Convert to fraction form
    61,912.68/85,439.84 = 33,618.36/x
  3. Step 3: Cross multiply
    61,912.68x = 85,439.84 × 33,618.36
  4. Step 4: Simplify right side
    61,912.68x = 2,872,347,299.46
  5. Step 5: Solve for x
    x = 2,872,347,299.46/61,912.68
  6. Step 6: Final answer
    x = 46,393.52

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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.