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Finding the Fourth Proportional to 45,357.87, 68,013.49 and 20,376.49

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Solution

The fourth proportional to 45,357.87, 68,013.49 and 20,376.49 is: 30,554.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,357.87 : 68,013.49 = 20,376.49 : x
  2. Step 2: Convert to fraction form
    45,357.87/68,013.49 = 20,376.49/x
  3. Step 3: Cross multiply
    45,357.87x = 68,013.49 × 20,376.49
  4. Step 4: Simplify right side
    45,357.87x = 1,385,876,198.85
  5. Step 5: Solve for x
    x = 1,385,876,198.85/45,357.87
  6. Step 6: Final answer
    x = 30,554.26

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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.