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Finding the Fourth Proportional to 68,135.55, 102,195.52 and 18,219.53

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Solution

The fourth proportional to 68,135.55, 102,195.52 and 18,219.53 is: 27,327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,135.55 : 102,195.52 = 18,219.53 : x
  2. Step 2: Convert to fraction form
    68,135.55/102,195.52 = 18,219.53/x
  3. Step 3: Cross multiply
    68,135.55x = 102,195.52 × 18,219.53
  4. Step 4: Simplify right side
    68,135.55x = 1,861,954,251.41
  5. Step 5: Solve for x
    x = 1,861,954,251.41/68,135.55
  6. Step 6: Final answer
    x = 27,327.21

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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.