Home / 257,690.07-386,559.70-80,149.41

Finding the Fourth Proportional to 257,690.07, 386,559.70 and 80,149.41

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Solution

The fourth proportional to 257,690.07, 386,559.70 and 80,149.41 is: 120,231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,690.07 : 386,559.70 = 80,149.41 : x
  2. Step 2: Convert to fraction form
    257,690.07/386,559.70 = 80,149.41/x
  3. Step 3: Cross multiply
    257,690.07x = 386,559.70 × 80,149.41
  4. Step 4: Simplify right side
    257,690.07x = 30,982,531,884.78
  5. Step 5: Solve for x
    x = 30,982,531,884.78/257,690.07
  6. Step 6: Final answer
    x = 120,231.76

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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.