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Finding the Fourth Proportional to 61,751.12, 85,216.72 and 33,456.80

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Solution

The fourth proportional to 61,751.12, 85,216.72 and 33,456.80 is: 46,170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,751.12 : 85,216.72 = 33,456.80 : x
  2. Step 2: Convert to fraction form
    61,751.12/85,216.72 = 33,456.80/x
  3. Step 3: Cross multiply
    61,751.12x = 85,216.72 × 33,456.80
  4. Step 4: Simplify right side
    61,751.12x = 2,851,078,757.70
  5. Step 5: Solve for x
    x = 2,851,078,757.70/61,751.12
  6. Step 6: Final answer
    x = 46,170.48

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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.