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Finding the Fourth Proportional to 45,220.50, 67,836.51 and 12,388.50

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Solution

The fourth proportional to 45,220.50, 67,836.51 and 12,388.50 is: 18,584.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,220.50 : 67,836.51 = 12,388.50 : x
  2. Step 2: Convert to fraction form
    45,220.50/67,836.51 = 12,388.50/x
  3. Step 3: Cross multiply
    45,220.50x = 67,836.51 × 12,388.50
  4. Step 4: Simplify right side
    45,220.50x = 840,392,604.14
  5. Step 5: Solve for x
    x = 840,392,604.14/45,220.50
  6. Step 6: Final answer
    x = 18,584.33

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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.