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Finding the Fourth Proportional to 206,520.70, 309,708.15 and 73,405.30

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Solution

The fourth proportional to 206,520.70, 309,708.15 and 73,405.30 is: 110,082.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,520.70 : 309,708.15 = 73,405.30 : x
  2. Step 2: Convert to fraction form
    206,520.70/309,708.15 = 73,405.30/x
  3. Step 3: Cross multiply
    206,520.70x = 309,708.15 × 73,405.30
  4. Step 4: Simplify right side
    206,520.70x = 22,734,219,663.20
  5. Step 5: Solve for x
    x = 22,734,219,663.20/206,520.70
  6. Step 6: Final answer
    x = 110,082.04

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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.