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Finding the Fourth Proportional to 171,910.72, 257,966.48 and 72,063.24

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Solution

The fourth proportional to 171,910.72, 257,966.48 and 72,063.24 is: 108,136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,910.72 : 257,966.48 = 72,063.24 : x
  2. Step 2: Convert to fraction form
    171,910.72/257,966.48 = 72,063.24/x
  3. Step 3: Cross multiply
    171,910.72x = 257,966.48 × 72,063.24
  4. Step 4: Simplify right side
    171,910.72x = 18,589,900,360.20
  5. Step 5: Solve for x
    x = 18,589,900,360.20/171,910.72
  6. Step 6: Final answer
    x = 108,136.95

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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.