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Finding the Fourth Proportional to 71,128.82, 106,709.11 and 26,755.97

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Solution

The fourth proportional to 71,128.82, 106,709.11 and 26,755.97 is: 40,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.82 : 106,709.11 = 26,755.97 : x
  2. Step 2: Convert to fraction form
    71,128.82/106,709.11 = 26,755.97/x
  3. Step 3: Cross multiply
    71,128.82x = 106,709.11 × 26,755.97
  4. Step 4: Simplify right side
    71,128.82x = 2,855,105,145.45
  5. Step 5: Solve for x
    x = 2,855,105,145.45/71,128.82
  6. Step 6: Final answer
    x = 40,139.92

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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.