Home / 257,245.12-385,882.25-79,777.36

Finding the Fourth Proportional to 257,245.12, 385,882.25 and 79,777.36

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Solution

The fourth proportional to 257,245.12, 385,882.25 and 79,777.36 is: 119,670.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,245.12 : 385,882.25 = 79,777.36 : x
  2. Step 2: Convert to fraction form
    257,245.12/385,882.25 = 79,777.36/x
  3. Step 3: Cross multiply
    257,245.12x = 385,882.25 × 79,777.36
  4. Step 4: Simplify right side
    257,245.12x = 30,784,667,175.86
  5. Step 5: Solve for x
    x = 30,784,667,175.86/257,245.12
  6. Step 6: Final answer
    x = 119,670.56

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1.5x scale

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.