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Finding the Fourth Proportional to 103,367.70, 155,062.26 and 28,487.85

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Solution

The fourth proportional to 103,367.70, 155,062.26 and 28,487.85 is: 42,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,367.70 : 155,062.26 = 28,487.85 : x
  2. Step 2: Convert to fraction form
    103,367.70/155,062.26 = 28,487.85/x
  3. Step 3: Cross multiply
    103,367.70x = 155,062.26 × 28,487.85
  4. Step 4: Simplify right side
    103,367.70x = 4,417,390,403.54
  5. Step 5: Solve for x
    x = 4,417,390,403.54/103,367.70
  6. Step 6: Final answer
    x = 42,734.73

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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.