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Finding the Fourth Proportional to 172,387.20, 258,589.44 and 61,579.20

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Solution

The fourth proportional to 172,387.20, 258,589.44 and 61,579.20 is: 92,371.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,387.20 : 258,589.44 = 61,579.20 : x
  2. Step 2: Convert to fraction form
    172,387.20/258,589.44 = 61,579.20/x
  3. Step 3: Cross multiply
    172,387.20x = 258,589.44 × 61,579.20
  4. Step 4: Simplify right side
    172,387.20x = 15,923,730,843.65
  5. Step 5: Solve for x
    x = 15,923,730,843.65/172,387.20
  6. Step 6: Final answer
    x = 92,371.89

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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.