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Finding the Fourth Proportional to 172,919.80, 258,942.30 and 137,927.80

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Solution

The fourth proportional to 172,919.80, 258,942.30 and 137,927.80 is: 206,542.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,919.80 : 258,942.30 = 137,927.80 : x
  2. Step 2: Convert to fraction form
    172,919.80/258,942.30 = 137,927.80/x
  3. Step 3: Cross multiply
    172,919.80x = 258,942.30 × 137,927.80
  4. Step 4: Simplify right side
    172,919.80x = 35,715,341,765.94
  5. Step 5: Solve for x
    x = 35,715,341,765.94/172,919.80
  6. Step 6: Final answer
    x = 206,542.81

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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.