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Finding the Fourth Proportional to 259,991.70, 389,872.35 and 119,793.30

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Solution

The fourth proportional to 259,991.70, 389,872.35 and 119,793.30 is: 179,636.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,991.70 : 389,872.35 = 119,793.30 : x
  2. Step 2: Convert to fraction form
    259,991.70/389,872.35 = 119,793.30/x
  3. Step 3: Cross multiply
    259,991.70x = 389,872.35 × 119,793.30
  4. Step 4: Simplify right side
    259,991.70x = 46,704,095,385.26
  5. Step 5: Solve for x
    x = 46,704,095,385.26/259,991.70
  6. Step 6: Final answer
    x = 179,636.87

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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.