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Finding the Fourth Proportional to 68,611.92, 102,736.80 and 55,213.44

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Solution

The fourth proportional to 68,611.92, 102,736.80 and 55,213.44 is: 82,674.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,611.92 : 102,736.80 = 55,213.44 : x
  2. Step 2: Convert to fraction form
    68,611.92/102,736.80 = 55,213.44/x
  3. Step 3: Cross multiply
    68,611.92x = 102,736.80 × 55,213.44
  4. Step 4: Simplify right side
    68,611.92x = 5,672,452,142.59
  5. Step 5: Solve for x
    x = 5,672,452,142.59/68,611.92
  6. Step 6: Final answer
    x = 82,674.44

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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.