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Finding the Fourth Proportional to 103,691.85, 155,537.68 and 28,811.95

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Solution

The fourth proportional to 103,691.85, 155,537.68 and 28,811.95 is: 43,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,691.85 : 155,537.68 = 28,811.95 : x
  2. Step 2: Convert to fraction form
    103,691.85/155,537.68 = 28,811.95/x
  3. Step 3: Cross multiply
    103,691.85x = 155,537.68 × 28,811.95
  4. Step 4: Simplify right side
    103,691.85x = 4,481,344,367.84
  5. Step 5: Solve for x
    x = 4,481,344,367.84/103,691.85
  6. Step 6: Final answer
    x = 43,217.91

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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.