Home / 259,758.20-389,540.10-91,213.40

Finding the Fourth Proportional to 259,758.20, 389,540.10 and 91,213.40

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Solution

The fourth proportional to 259,758.20, 389,540.10 and 91,213.40 is: 136,785.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,758.20 : 389,540.10 = 91,213.40 : x
  2. Step 2: Convert to fraction form
    259,758.20/389,540.10 = 91,213.40/x
  3. Step 3: Cross multiply
    259,758.20x = 389,540.10 × 91,213.40
  4. Step 4: Simplify right side
    259,758.20x = 35,531,276,957.34
  5. Step 5: Solve for x
    x = 35,531,276,957.34/259,758.20
  6. Step 6: Final answer
    x = 136,785.97

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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.