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Finding the Fourth Proportional to 68,676.39, 103,013.51 and 28,716.80

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Solution

The fourth proportional to 68,676.39, 103,013.51 and 28,716.80 is: 43,074.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,676.39 : 103,013.51 = 28,716.80 : x
  2. Step 2: Convert to fraction form
    68,676.39/103,013.51 = 28,716.80/x
  3. Step 3: Cross multiply
    68,676.39x = 103,013.51 × 28,716.80
  4. Step 4: Simplify right side
    68,676.39x = 2,958,217,705.32
  5. Step 5: Solve for x
    x = 2,958,217,705.32/68,676.39
  6. Step 6: Final answer
    x = 43,074.74

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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.