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Finding the Fourth Proportional to 67,320.44, 100,980.66 and 18,072.44

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Solution

The fourth proportional to 67,320.44, 100,980.66 and 18,072.44 is: 27,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,320.44 : 100,980.66 = 18,072.44 : x
  2. Step 2: Convert to fraction form
    67,320.44/100,980.66 = 18,072.44/x
  3. Step 3: Cross multiply
    67,320.44x = 100,980.66 × 18,072.44
  4. Step 4: Simplify right side
    67,320.44x = 1,824,966,919.01
  5. Step 5: Solve for x
    x = 1,824,966,919.01/67,320.44
  6. Step 6: Final answer
    x = 27,108.66

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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.