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Finding the Fourth Proportional to 61,712.70, 85,163.40 and 33,418.30

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Solution

The fourth proportional to 61,712.70, 85,163.40 and 33,418.30 is: 46,117.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,712.70 : 85,163.40 = 33,418.30 : x
  2. Step 2: Convert to fraction form
    61,712.70/85,163.40 = 33,418.30/x
  3. Step 3: Cross multiply
    61,712.70x = 85,163.40 × 33,418.30
  4. Step 4: Simplify right side
    61,712.70x = 2,846,015,540.86
  5. Step 5: Solve for x
    x = 2,846,015,540.86/61,712.70
  6. Step 6: Final answer
    x = 46,117.18

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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.