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Finding the Fourth Proportional to 73,620.22, 110,428.08 and 21,029.80

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Solution

The fourth proportional to 73,620.22, 110,428.08 and 21,029.80 is: 31,544.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,620.22 : 110,428.08 = 21,029.80 : x
  2. Step 2: Convert to fraction form
    73,620.22/110,428.08 = 21,029.80/x
  3. Step 3: Cross multiply
    73,620.22x = 110,428.08 × 21,029.80
  4. Step 4: Simplify right side
    73,620.22x = 2,322,280,436.78
  5. Step 5: Solve for x
    x = 2,322,280,436.78/73,620.22
  6. Step 6: Final answer
    x = 31,544.06

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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.