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Finding the Fourth Proportional to 172,553.01, 258,855.63 and 54,213.21

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Solution

The fourth proportional to 172,553.01, 258,855.63 and 54,213.21 is: 81,328.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,553.01 : 258,855.63 = 54,213.21 : x
  2. Step 2: Convert to fraction form
    172,553.01/258,855.63 = 54,213.21/x
  3. Step 3: Cross multiply
    172,553.01x = 258,855.63 × 54,213.21
  4. Step 4: Simplify right side
    172,553.01x = 14,033,394,628.87
  5. Step 5: Solve for x
    x = 14,033,394,628.87/172,553.01
  6. Step 6: Final answer
    x = 81,328.02

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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.