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Finding the Fourth Proportional to 172,920.80, 259,381.20 and 54,604.10

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Solution

The fourth proportional to 172,920.80, 259,381.20 and 54,604.10 is: 81,906.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,920.80 : 259,381.20 = 54,604.10 : x
  2. Step 2: Convert to fraction form
    172,920.80/259,381.20 = 54,604.10/x
  3. Step 3: Cross multiply
    172,920.80x = 259,381.20 × 54,604.10
  4. Step 4: Simplify right side
    172,920.80x = 14,163,276,982.92
  5. Step 5: Solve for x
    x = 14,163,276,982.92/172,920.80
  6. Step 6: Final answer
    x = 81,906.15

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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.