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Finding the Fourth Proportional to 68,872.87, 103,309.24 and 18,953.25

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Solution

The fourth proportional to 68,872.87, 103,309.24 and 18,953.25 is: 28,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,872.87 : 103,309.24 = 18,953.25 : x
  2. Step 2: Convert to fraction form
    68,872.87/103,309.24 = 18,953.25/x
  3. Step 3: Cross multiply
    68,872.87x = 103,309.24 × 18,953.25
  4. Step 4: Simplify right side
    68,872.87x = 1,958,045,853.03
  5. Step 5: Solve for x
    x = 1,958,045,853.03/68,872.87
  6. Step 6: Final answer
    x = 28,429.86

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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.