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Finding the Fourth Proportional to 71,379.80, 107,021.10 and 26,999.90

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Solution

The fourth proportional to 71,379.80, 107,021.10 and 26,999.90 is: 40,481.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.80 : 107,021.10 = 26,999.90 : x
  2. Step 2: Convert to fraction form
    71,379.80/107,021.10 = 26,999.90/x
  3. Step 3: Cross multiply
    71,379.80x = 107,021.10 × 26,999.90
  4. Step 4: Simplify right side
    71,379.80x = 2,889,558,997.89
  5. Step 5: Solve for x
    x = 2,889,558,997.89/71,379.80
  6. Step 6: Final answer
    x = 40,481.47

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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.