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Finding the Fourth Proportional to 61,905.72, 85,429.91 and 33,611.42

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Solution

The fourth proportional to 61,905.72, 85,429.91 and 33,611.42 is: 46,383.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,905.72 : 85,429.91 = 33,611.42 : x
  2. Step 2: Convert to fraction form
    61,905.72/85,429.91 = 33,611.42/x
  3. Step 3: Cross multiply
    61,905.72x = 85,429.91 × 33,611.42
  4. Step 4: Simplify right side
    61,905.72x = 2,871,419,990.37
  5. Step 5: Solve for x
    x = 2,871,419,990.37/61,905.72
  6. Step 6: Final answer
    x = 46,383.76

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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.