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Finding the Fourth Proportional to 207,086.82, 310,663.03 and 66,812.64

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Solution

The fourth proportional to 207,086.82, 310,663.03 and 66,812.64 is: 100,229.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,086.82 : 310,663.03 = 66,812.64 : x
  2. Step 2: Convert to fraction form
    207,086.82/310,663.03 = 66,812.64/x
  3. Step 3: Cross multiply
    207,086.82x = 310,663.03 × 66,812.64
  4. Step 4: Simplify right side
    207,086.82x = 20,756,217,184.70
  5. Step 5: Solve for x
    x = 20,756,217,184.70/207,086.82
  6. Step 6: Final answer
    x = 100,229.54

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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.