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Finding the Fourth Proportional to 206,950.20, 310,479.30 and 66,712.20

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Solution

The fourth proportional to 206,950.20, 310,479.30 and 66,712.20 is: 100,085.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,950.20 : 310,479.30 = 66,712.20 : x
  2. Step 2: Convert to fraction form
    206,950.20/310,479.30 = 66,712.20/x
  3. Step 3: Cross multiply
    206,950.20x = 310,479.30 × 66,712.20
  4. Step 4: Simplify right side
    206,950.20x = 20,712,757,157.46
  5. Step 5: Solve for x
    x = 20,712,757,157.46/206,950.20
  6. Step 6: Final answer
    x = 100,085.71

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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.