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Finding the Fourth Proportional to 206,600.70, 309,901.05 and 173,139.60

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Solution

The fourth proportional to 206,600.70, 309,901.05 and 173,139.60 is: 259,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,600.70 : 309,901.05 = 173,139.60 : x
  2. Step 2: Convert to fraction form
    206,600.70/309,901.05 = 173,139.60/x
  3. Step 3: Cross multiply
    206,600.70x = 309,901.05 × 173,139.60
  4. Step 4: Simplify right side
    206,600.70x = 53,656,143,836.58
  5. Step 5: Solve for x
    x = 53,656,143,836.58/206,600.70
  6. Step 6: Final answer
    x = 259,709.40

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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.