Home / 445,147.20-667,720.80-129,614.40

Finding the Fourth Proportional to 445,147.20, 667,720.80 and 129,614.40

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Solution

The fourth proportional to 445,147.20, 667,720.80 and 129,614.40 is: 194,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,147.20 : 667,720.80 = 129,614.40 : x
  2. Step 2: Convert to fraction form
    445,147.20/667,720.80 = 129,614.40/x
  3. Step 3: Cross multiply
    445,147.20x = 667,720.80 × 129,614.40
  4. Step 4: Simplify right side
    445,147.20x = 86,546,230,859.52
  5. Step 5: Solve for x
    x = 86,546,230,859.52/445,147.20
  6. Step 6: Final answer
    x = 194,421.60

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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.