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Finding the Fourth Proportional to 40,143.36, 60,252 and 20,436

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Solution

The fourth proportional to 40,143.36, 60,252 and 20,436 is: 30,672.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,143.36 : 60,252 = 20,436 : x
  2. Step 2: Convert to fraction form
    40,143.36/60,252 = 20,436/x
  3. Step 3: Cross multiply
    40,143.36x = 60,252 × 20,436
  4. Step 4: Simplify right side
    40,143.36x = 1,231,309,872
  5. Step 5: Solve for x
    x = 1,231,309,872/40,143.36
  6. Step 6: Final answer
    x = 30,672.82

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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.