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Finding the Fourth Proportional to 107,717.80, 161,511.90 and 55,229.80

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Solution

The fourth proportional to 107,717.80, 161,511.90 and 55,229.80 is: 82,811.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,717.80 : 161,511.90 = 55,229.80 : x
  2. Step 2: Convert to fraction form
    107,717.80/161,511.90 = 55,229.80/x
  3. Step 3: Cross multiply
    107,717.80x = 161,511.90 × 55,229.80
  4. Step 4: Simplify right side
    107,717.80x = 8,920,269,934.62
  5. Step 5: Solve for x
    x = 8,920,269,934.62/107,717.80
  6. Step 6: Final answer
    x = 82,811.48

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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.