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Finding the Fourth Proportional to 68,677.39, 103,015 and 28,717.80

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Solution

The fourth proportional to 68,677.39, 103,015 and 28,717.80 is: 43,076.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,677.39 : 103,015 = 28,717.80 : x
  2. Step 2: Convert to fraction form
    68,677.39/103,015 = 28,717.80/x
  3. Step 3: Cross multiply
    68,677.39x = 103,015 × 28,717.80
  4. Step 4: Simplify right side
    68,677.39x = 2,958,364,167
  5. Step 5: Solve for x
    x = 2,958,364,167/68,677.39
  6. Step 6: Final answer
    x = 43,076.25

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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.