Home / 257,419.38-386,124.92-79,926.56

Finding the Fourth Proportional to 257,419.38, 386,124.92 and 79,926.56

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Solution

The fourth proportional to 257,419.38, 386,124.92 and 79,926.56 is: 119,888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,419.38 : 386,124.92 = 79,926.56 : x
  2. Step 2: Convert to fraction form
    257,419.38/386,124.92 = 79,926.56/x
  3. Step 3: Cross multiply
    257,419.38x = 386,124.92 × 79,926.56
  4. Step 4: Simplify right side
    257,419.38x = 30,861,634,655.25
  5. Step 5: Solve for x
    x = 30,861,634,655.25/257,419.38
  6. Step 6: Final answer
    x = 119,888.55

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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.