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Finding the Fourth Proportional to 45,404.28, 68,089.14 and 20,763

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Solution

The fourth proportional to 45,404.28, 68,089.14 and 20,763 is: 31,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,404.28 : 68,089.14 = 20,763 : x
  2. Step 2: Convert to fraction form
    45,404.28/68,089.14 = 20,763/x
  3. Step 3: Cross multiply
    45,404.28x = 68,089.14 × 20,763
  4. Step 4: Simplify right side
    45,404.28x = 1,413,734,813.82
  5. Step 5: Solve for x
    x = 1,413,734,813.82/45,404.28
  6. Step 6: Final answer
    x = 31,136.60

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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.