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Finding the Fourth Proportional to 206,865.40, 310,451.70 and 82,295.80

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Solution

The fourth proportional to 206,865.40, 310,451.70 and 82,295.80 is: 123,504.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,865.40 : 310,451.70 = 82,295.80 : x
  2. Step 2: Convert to fraction form
    206,865.40/310,451.70 = 82,295.80/x
  3. Step 3: Cross multiply
    206,865.40x = 310,451.70 × 82,295.80
  4. Step 4: Simplify right side
    206,865.40x = 25,548,871,012.86
  5. Step 5: Solve for x
    x = 25,548,871,012.86/206,865.40
  6. Step 6: Final answer
    x = 123,504.81

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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.