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Finding the Fourth Proportional to 206,465.80, 309,986.70 and 132,046.60

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Solution

The fourth proportional to 206,465.80, 309,986.70 and 132,046.60 is: 198,254.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,465.80 : 309,986.70 = 132,046.60 : x
  2. Step 2: Convert to fraction form
    206,465.80/309,986.70 = 132,046.60/x
  3. Step 3: Cross multiply
    206,465.80x = 309,986.70 × 132,046.60
  4. Step 4: Simplify right side
    206,465.80x = 40,932,689,780.22
  5. Step 5: Solve for x
    x = 40,932,689,780.22/206,465.80
  6. Step 6: Final answer
    x = 198,254.09

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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.