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Finding the Fourth Proportional to 209,286.20, 313,922.36 and 90,957.68

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Solution

The fourth proportional to 209,286.20, 313,922.36 and 90,957.68 is: 136,433.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,286.20 : 313,922.36 = 90,957.68 : x
  2. Step 2: Convert to fraction form
    209,286.20/313,922.36 = 90,957.68/x
  3. Step 3: Cross multiply
    209,286.20x = 313,922.36 × 90,957.68
  4. Step 4: Simplify right side
    209,286.20x = 28,553,649,565.72
  5. Step 5: Solve for x
    x = 28,553,649,565.72/209,286.20
  6. Step 6: Final answer
    x = 136,433.50

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.