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Finding the Fourth Proportional to 209,065.33, 313,618.67 and 66,874.90

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Solution

The fourth proportional to 209,065.33, 313,618.67 and 66,874.90 is: 100,318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,065.33 : 313,618.67 = 66,874.90 : x
  2. Step 2: Convert to fraction form
    209,065.33/313,618.67 = 66,874.90/x
  3. Step 3: Cross multiply
    209,065.33x = 313,618.67 × 66,874.90
  4. Step 4: Simplify right side
    209,065.33x = 20,973,217,194.38
  5. Step 5: Solve for x
    x = 20,973,217,194.38/209,065.33
  6. Step 6: Final answer
    x = 100,318.96

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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.