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Finding the Fourth Proportional to 171,910.22, 257,965.73 and 72,062.74

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Solution

The fourth proportional to 171,910.22, 257,965.73 and 72,062.74 is: 108,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,910.22 : 257,965.73 = 72,062.74 : x
  2. Step 2: Convert to fraction form
    171,910.22/257,965.73 = 72,062.74/x
  3. Step 3: Cross multiply
    171,910.22x = 257,965.73 × 72,062.74
  4. Step 4: Simplify right side
    171,910.22x = 18,589,717,329.90
  5. Step 5: Solve for x
    x = 18,589,717,329.90/171,910.22
  6. Step 6: Final answer
    x = 108,136.20

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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.