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Finding the Fourth Proportional to 209,219.70, 313,815.15 and 67,062.90

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Solution

The fourth proportional to 209,219.70, 313,815.15 and 67,062.90 is: 100,589.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,219.70 : 313,815.15 = 67,062.90 : x
  2. Step 2: Convert to fraction form
    209,219.70/313,815.15 = 67,062.90/x
  3. Step 3: Cross multiply
    209,219.70x = 313,815.15 × 67,062.90
  4. Step 4: Simplify right side
    209,219.70x = 21,045,354,022.94
  5. Step 5: Solve for x
    x = 21,045,354,022.94/209,219.70
  6. Step 6: Final answer
    x = 100,589.73

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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.