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Finding the Fourth Proportional to 68,916.88, 103,309.66 and 22,136.92

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Solution

The fourth proportional to 68,916.88, 103,309.66 and 22,136.92 is: 33,184.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,916.88 : 103,309.66 = 22,136.92 : x
  2. Step 2: Convert to fraction form
    68,916.88/103,309.66 = 22,136.92/x
  3. Step 3: Cross multiply
    68,916.88x = 103,309.66 × 22,136.92
  4. Step 4: Simplify right side
    68,916.88x = 2,286,957,678.65
  5. Step 5: Solve for x
    x = 2,286,957,678.65/68,916.88
  6. Step 6: Final answer
    x = 33,184.29

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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.