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Finding the Fourth Proportional to 171,687.30, 257,640.30 and 100,609.80

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Solution

The fourth proportional to 171,687.30, 257,640.30 and 100,609.80 is: 150,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,687.30 : 257,640.30 = 100,609.80 : x
  2. Step 2: Convert to fraction form
    171,687.30/257,640.30 = 100,609.80/x
  3. Step 3: Cross multiply
    171,687.30x = 257,640.30 × 100,609.80
  4. Step 4: Simplify right side
    171,687.30x = 25,921,139,054.94
  5. Step 5: Solve for x
    x = 25,921,139,054.94/171,687.30
  6. Step 6: Final answer
    x = 150,978.78

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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.