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Finding the Fourth Proportional to 259,871.20, 389,691.60 and 119,672.80

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Solution

The fourth proportional to 259,871.20, 389,691.60 and 119,672.80 is: 179,456.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,871.20 : 389,691.60 = 119,672.80 : x
  2. Step 2: Convert to fraction form
    259,871.20/389,691.60 = 119,672.80/x
  3. Step 3: Cross multiply
    259,871.20x = 389,691.60 × 119,672.80
  4. Step 4: Simplify right side
    259,871.20x = 46,635,484,908.48
  5. Step 5: Solve for x
    x = 46,635,484,908.48/259,871.20
  6. Step 6: Final answer
    x = 179,456.15

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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.