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Finding the Fourth Proportional to 209,380.11, 313,950.81 and 142,900.71

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Solution

The fourth proportional to 209,380.11, 313,950.81 and 142,900.71 is: 214,269.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,380.11 : 313,950.81 = 142,900.71 : x
  2. Step 2: Convert to fraction form
    209,380.11/313,950.81 = 142,900.71/x
  3. Step 3: Cross multiply
    209,380.11x = 313,950.81 × 142,900.71
  4. Step 4: Simplify right side
    209,380.11x = 44,863,793,654.08
  5. Step 5: Solve for x
    x = 44,863,793,654.08/209,380.11
  6. Step 6: Final answer
    x = 214,269.61

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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.