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Finding the Fourth Proportional to 61,778.92, 85,255 and 33,484.60

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Solution

The fourth proportional to 61,778.92, 85,255 and 33,484.60 is: 46,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,778.92 : 85,255 = 33,484.60 : x
  2. Step 2: Convert to fraction form
    61,778.92/85,255 = 33,484.60/x
  3. Step 3: Cross multiply
    61,778.92x = 85,255 × 33,484.60
  4. Step 4: Simplify right side
    61,778.92x = 2,854,729,573
  5. Step 5: Solve for x
    x = 2,854,729,573/61,778.92
  6. Step 6: Final answer
    x = 46,208.80

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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.