Home / 414,138.90-621,190.28-129,822.96

Finding the Fourth Proportional to 414,138.90, 621,190.28 and 129,822.96

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Solution

The fourth proportional to 414,138.90, 621,190.28 and 129,822.96 is: 194,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,138.90 : 621,190.28 = 129,822.96 : x
  2. Step 2: Convert to fraction form
    414,138.90/621,190.28 = 129,822.96/x
  3. Step 3: Cross multiply
    414,138.90x = 621,190.28 × 129,822.96
  4. Step 4: Simplify right side
    414,138.90x = 80,644,763,178.04
  5. Step 5: Solve for x
    x = 80,644,763,178.04/414,138.90
  6. Step 6: Final answer
    x = 194,728.78

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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.