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Finding the Fourth Proportional to 172,758.26, 258,981.87 and 61,872.50

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Solution

The fourth proportional to 172,758.26, 258,981.87 and 61,872.50 is: 92,753.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,758.26 : 258,981.87 = 61,872.50 : x
  2. Step 2: Convert to fraction form
    172,758.26/258,981.87 = 61,872.50/x
  3. Step 3: Cross multiply
    172,758.26x = 258,981.87 × 61,872.50
  4. Step 4: Simplify right side
    172,758.26x = 16,023,855,751.58
  5. Step 5: Solve for x
    x = 16,023,855,751.58/172,758.26
  6. Step 6: Final answer
    x = 92,753.05

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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.