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Finding the Fourth Proportional to 61,915.92, 85,443.22 and 33,621.81

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Solution

The fourth proportional to 61,915.92, 85,443.22 and 33,621.81 is: 46,397.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,915.92 : 85,443.22 = 33,621.81 : x
  2. Step 2: Convert to fraction form
    61,915.92/85,443.22 = 33,621.81/x
  3. Step 3: Cross multiply
    61,915.92x = 85,443.22 × 33,621.81
  4. Step 4: Simplify right side
    61,915.92x = 2,872,755,708.63
  5. Step 5: Solve for x
    x = 2,872,755,708.63/61,915.92
  6. Step 6: Final answer
    x = 46,397.69

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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.