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Finding the Fourth Proportional to 172,969.80, 259,503.30 and 84,226.20

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Solution

The fourth proportional to 172,969.80, 259,503.30 and 84,226.20 is: 126,362.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,969.80 : 259,503.30 = 84,226.20 : x
  2. Step 2: Convert to fraction form
    172,969.80/259,503.30 = 84,226.20/x
  3. Step 3: Cross multiply
    172,969.80x = 259,503.30 × 84,226.20
  4. Step 4: Simplify right side
    172,969.80x = 21,856,976,846.46
  5. Step 5: Solve for x
    x = 21,856,976,846.46/172,969.80
  6. Step 6: Final answer
    x = 126,362.97

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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.