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Finding the Fourth Proportional to 61,853.91, 92,781.42 and 21,873.93

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Solution

The fourth proportional to 61,853.91, 92,781.42 and 21,873.93 is: 32,811.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,853.91 : 92,781.42 = 21,873.93 : x
  2. Step 2: Convert to fraction form
    61,853.91/92,781.42 = 21,873.93/x
  3. Step 3: Cross multiply
    61,853.91x = 92,781.42 × 21,873.93
  4. Step 4: Simplify right side
    61,853.91x = 2,029,494,286.38
  5. Step 5: Solve for x
    x = 2,029,494,286.38/61,853.91
  6. Step 6: Final answer
    x = 32,811.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.