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Finding the Fourth Proportional to 206,998.14, 310,497.20 and 66,756.76

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Solution

The fourth proportional to 206,998.14, 310,497.20 and 66,756.76 is: 100,135.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,998.14 : 310,497.20 = 66,756.76 : x
  2. Step 2: Convert to fraction form
    206,998.14/310,497.20 = 66,756.76/x
  3. Step 3: Cross multiply
    206,998.14x = 310,497.20 × 66,756.76
  4. Step 4: Simplify right side
    206,998.14x = 20,727,787,061.07
  5. Step 5: Solve for x
    x = 20,727,787,061.07/206,998.14
  6. Step 6: Final answer
    x = 100,135.14

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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.