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Finding the Fourth Proportional to 71,756.70, 107,638.77 and 21,832.86

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Solution

The fourth proportional to 71,756.70, 107,638.77 and 21,832.86 is: 32,750.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,756.70 : 107,638.77 = 21,832.86 : x
  2. Step 2: Convert to fraction form
    71,756.70/107,638.77 = 21,832.86/x
  3. Step 3: Cross multiply
    71,756.70x = 107,638.77 × 21,832.86
  4. Step 4: Simplify right side
    71,756.70x = 2,350,062,195.98
  5. Step 5: Solve for x
    x = 2,350,062,195.98/71,756.70
  6. Step 6: Final answer
    x = 32,750.42

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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.