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Finding the Fourth Proportional to 209,073.29, 313,630.61 and 66,882.84

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Solution

The fourth proportional to 209,073.29, 313,630.61 and 66,882.84 is: 100,330.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,073.29 : 313,630.61 = 66,882.84 : x
  2. Step 2: Convert to fraction form
    209,073.29/313,630.61 = 66,882.84/x
  3. Step 3: Cross multiply
    209,073.29x = 313,630.61 × 66,882.84
  4. Step 4: Simplify right side
    209,073.29x = 20,976,505,573.32
  5. Step 5: Solve for x
    x = 20,976,505,573.32/209,073.29
  6. Step 6: Final answer
    x = 100,330.87

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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.