Home / 431,388,481.20-647,082,721.80-140,265,101.40

Finding the Fourth Proportional to 431,388,481.20, 647,082,721.80 and 140,265,101.40

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Solution

The fourth proportional to 431,388,481.20, 647,082,721.80 and 140,265,101.40 is: 210,397,652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,388,481.20 : 647,082,721.80 = 140,265,101.40 : x
  2. Step 2: Convert to fraction form
    431,388,481.20/647,082,721.80 = 140,265,101.40/x
  3. Step 3: Cross multiply
    431,388,481.20x = 647,082,721.80 × 140,265,101.40
  4. Step 4: Simplify right side
    431,388,481.20x = 90,763,123,587,464,992
  5. Step 5: Solve for x
    x = 90,763,123,587,464,992/431,388,481.20
  6. Step 6: Final answer
    x = 210,397,652.10

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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.