Home / 259,720.80-389,581.20-82,241.70

Finding the Fourth Proportional to 259,720.80, 389,581.20 and 82,241.70

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Solution

The fourth proportional to 259,720.80, 389,581.20 and 82,241.70 is: 123,362.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,720.80 : 389,581.20 = 82,241.70 : x
  2. Step 2: Convert to fraction form
    259,720.80/389,581.20 = 82,241.70/x
  3. Step 3: Cross multiply
    259,720.80x = 389,581.20 × 82,241.70
  4. Step 4: Simplify right side
    259,720.80x = 32,039,820,176.04
  5. Step 5: Solve for x
    x = 32,039,820,176.04/259,720.80
  6. Step 6: Final answer
    x = 123,362.55

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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.