Home / 259,405.50-389,120.19-79,478.04

Finding the Fourth Proportional to 259,405.50, 389,120.19 and 79,478.04

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Solution

The fourth proportional to 259,405.50, 389,120.19 and 79,478.04 is: 119,220.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,405.50 : 389,120.19 = 79,478.04 : x
  2. Step 2: Convert to fraction form
    259,405.50/389,120.19 = 79,478.04/x
  3. Step 3: Cross multiply
    259,405.50x = 389,120.19 × 79,478.04
  4. Step 4: Simplify right side
    259,405.50x = 30,926,511,186.79
  5. Step 5: Solve for x
    x = 30,926,511,186.79/259,405.50
  6. Step 6: Final answer
    x = 119,220.72

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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.