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Finding the Fourth Proportional to 172,934.82, 259,415.60 and 66,369.80

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Solution

The fourth proportional to 172,934.82, 259,415.60 and 66,369.80 is: 99,559.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,934.82 : 259,415.60 = 66,369.80 : x
  2. Step 2: Convert to fraction form
    172,934.82/259,415.60 = 66,369.80/x
  3. Step 3: Cross multiply
    172,934.82x = 259,415.60 × 66,369.80
  4. Step 4: Simplify right side
    172,934.82x = 17,217,361,805.57
  5. Step 5: Solve for x
    x = 17,217,361,805.57/172,934.82
  6. Step 6: Final answer
    x = 99,559.83

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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.