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Finding the Fourth Proportional to 206,521.20, 309,708.90 and 73,405.80

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Solution

The fourth proportional to 206,521.20, 309,708.90 and 73,405.80 is: 110,082.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,521.20 : 309,708.90 = 73,405.80 : x
  2. Step 2: Convert to fraction form
    206,521.20/309,708.90 = 73,405.80/x
  3. Step 3: Cross multiply
    206,521.20x = 309,708.90 × 73,405.80
  4. Step 4: Simplify right side
    206,521.20x = 22,734,429,571.62
  5. Step 5: Solve for x
    x = 22,734,429,571.62/206,521.20
  6. Step 6: Final answer
    x = 110,082.79

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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.