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Finding the Fourth Proportional to 259,722.20, 389,656.20 and 126,606.80

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Solution

The fourth proportional to 259,722.20, 389,656.20 and 126,606.80 is: 189,945.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,722.20 : 389,656.20 = 126,606.80 : x
  2. Step 2: Convert to fraction form
    259,722.20/389,656.20 = 126,606.80/x
  3. Step 3: Cross multiply
    259,722.20x = 389,656.20 × 126,606.80
  4. Step 4: Simplify right side
    259,722.20x = 49,333,124,582.16
  5. Step 5: Solve for x
    x = 49,333,124,582.16/259,722.20
  6. Step 6: Final answer
    x = 189,945.74

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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.