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Finding the Fourth Proportional to 39,978.44, 55,170.96 and 22,072.38

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Solution

The fourth proportional to 39,978.44, 55,170.96 and 22,072.38 is: 30,460.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.44 : 55,170.96 = 22,072.38 : x
  2. Step 2: Convert to fraction form
    39,978.44/55,170.96 = 22,072.38/x
  3. Step 3: Cross multiply
    39,978.44x = 55,170.96 × 22,072.38
  4. Step 4: Simplify right side
    39,978.44x = 1,217,754,104.42
  5. Step 5: Solve for x
    x = 1,217,754,104.42/39,978.44
  6. Step 6: Final answer
    x = 30,460.27

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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.