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Finding the Fourth Proportional to 61,912.92, 85,441.56 and 33,620.40

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Solution

The fourth proportional to 61,912.92, 85,441.56 and 33,620.40 is: 46,397.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,912.92 : 85,441.56 = 33,620.40 : x
  2. Step 2: Convert to fraction form
    61,912.92/85,441.56 = 33,620.40/x
  3. Step 3: Cross multiply
    61,912.92x = 85,441.56 × 33,620.40
  4. Step 4: Simplify right side
    61,912.92x = 2,872,579,423.82
  5. Step 5: Solve for x
    x = 2,872,579,423.82/61,912.92
  6. Step 6: Final answer
    x = 46,397.09

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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.