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Finding the Fourth Proportional to 172,932.30, 259,398.45 and 137,940.30

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Solution

The fourth proportional to 172,932.30, 259,398.45 and 137,940.30 is: 206,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,932.30 : 259,398.45 = 137,940.30 : x
  2. Step 2: Convert to fraction form
    172,932.30/259,398.45 = 137,940.30/x
  3. Step 3: Cross multiply
    172,932.30x = 259,398.45 × 137,940.30
  4. Step 4: Simplify right side
    172,932.30x = 35,781,500,012.54
  5. Step 5: Solve for x
    x = 35,781,500,012.54/172,932.30
  6. Step 6: Final answer
    x = 206,910.45

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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.