Home / 259,724.20-389,489.10-91,179.40

Finding the Fourth Proportional to 259,724.20, 389,489.10 and 91,179.40

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Solution

The fourth proportional to 259,724.20, 389,489.10 and 91,179.40 is: 136,734.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,724.20 : 389,489.10 = 91,179.40 : x
  2. Step 2: Convert to fraction form
    259,724.20/389,489.10 = 91,179.40/x
  3. Step 3: Cross multiply
    259,724.20x = 389,489.10 × 91,179.40
  4. Step 4: Simplify right side
    259,724.20x = 35,513,382,444.54
  5. Step 5: Solve for x
    x = 35,513,382,444.54/259,724.20
  6. Step 6: Final answer
    x = 136,734.98

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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.