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Finding the Fourth Proportional to 68,311, 94,269.90 and 38,503

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Solution

The fourth proportional to 68,311, 94,269.90 and 38,503 is: 53,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,311 : 94,269.90 = 38,503 : x
  2. Step 2: Convert to fraction form
    68,311/94,269.90 = 38,503/x
  3. Step 3: Cross multiply
    68,311x = 94,269.90 × 38,503
  4. Step 4: Simplify right side
    68,311x = 3,629,673,959.70
  5. Step 5: Solve for x
    x = 3,629,673,959.70/68,311
  6. Step 6: Final answer
    x = 53,134.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.