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Finding the Fourth Proportional to 259,481.20, 389,221.80 and 101,657.20

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Solution

The fourth proportional to 259,481.20, 389,221.80 and 101,657.20 is: 152,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,481.20 : 389,221.80 = 101,657.20 : x
  2. Step 2: Convert to fraction form
    259,481.20/389,221.80 = 101,657.20/x
  3. Step 3: Cross multiply
    259,481.20x = 389,221.80 × 101,657.20
  4. Step 4: Simplify right side
    259,481.20x = 39,567,198,366.96
  5. Step 5: Solve for x
    x = 39,567,198,366.96/259,481.20
  6. Step 6: Final answer
    x = 152,485.80

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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.