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Finding the Fourth Proportional to 259,879.20, 389,703.60 and 119,680.80

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Solution

The fourth proportional to 259,879.20, 389,703.60 and 119,680.80 is: 179,468.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,879.20 : 389,703.60 = 119,680.80 : x
  2. Step 2: Convert to fraction form
    259,879.20/389,703.60 = 119,680.80/x
  3. Step 3: Cross multiply
    259,879.20x = 389,703.60 × 119,680.80
  4. Step 4: Simplify right side
    259,879.20x = 46,640,038,610.88
  5. Step 5: Solve for x
    x = 46,640,038,610.88/259,879.20
  6. Step 6: Final answer
    x = 179,468.15

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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.