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Finding the Fourth Proportional to 172,739.62, 258,891.13 and 92,578.38

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Solution

The fourth proportional to 172,739.62, 258,891.13 and 92,578.38 is: 138,750.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,739.62 : 258,891.13 = 92,578.38 : x
  2. Step 2: Convert to fraction form
    172,739.62/258,891.13 = 92,578.38/x
  3. Step 3: Cross multiply
    172,739.62x = 258,891.13 × 92,578.38
  4. Step 4: Simplify right side
    172,739.62x = 23,967,721,411.77
  5. Step 5: Solve for x
    x = 23,967,721,411.77/172,739.62
  6. Step 6: Final answer
    x = 138,750.57

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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.