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Finding the Fourth Proportional to 172,930.80, 259,396.20 and 137,938.80

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Solution

The fourth proportional to 172,930.80, 259,396.20 and 137,938.80 is: 206,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,930.80 : 259,396.20 = 137,938.80 : x
  2. Step 2: Convert to fraction form
    172,930.80/259,396.20 = 137,938.80/x
  3. Step 3: Cross multiply
    172,930.80x = 259,396.20 × 137,938.80
  4. Step 4: Simplify right side
    172,930.80x = 35,780,800,552.56
  5. Step 5: Solve for x
    x = 35,780,800,552.56/172,930.80
  6. Step 6: Final answer
    x = 206,908.20

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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.