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Finding the Fourth Proportional to 53,893.60, 80,837.67 and 20,611.11

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Solution

The fourth proportional to 53,893.60, 80,837.67 and 20,611.11 is: 30,915.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,893.60 : 80,837.67 = 20,611.11 : x
  2. Step 2: Convert to fraction form
    53,893.60/80,837.67 = 20,611.11/x
  3. Step 3: Cross multiply
    53,893.60x = 80,837.67 × 20,611.11
  4. Step 4: Simplify right side
    53,893.60x = 1,666,153,976.27
  5. Step 5: Solve for x
    x = 1,666,153,976.27/53,893.60
  6. Step 6: Final answer
    x = 30,915.62

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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.