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Finding the Fourth Proportional to 68,319.21, 102,454.21 and 28,879.39

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Solution

The fourth proportional to 68,319.21, 102,454.21 and 28,879.39 is: 43,308.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,319.21 : 102,454.21 = 28,879.39 : x
  2. Step 2: Convert to fraction form
    68,319.21/102,454.21 = 28,879.39/x
  3. Step 3: Cross multiply
    68,319.21x = 102,454.21 × 28,879.39
  4. Step 4: Simplify right side
    68,319.21x = 2,958,815,087.73
  5. Step 5: Solve for x
    x = 2,958,815,087.73/68,319.21
  6. Step 6: Final answer
    x = 43,308.68

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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.