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Finding the Fourth Proportional to 172,716.39, 259,109.82 and 72,876.60

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Solution

The fourth proportional to 172,716.39, 259,109.82 and 72,876.60 is: 109,329.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,716.39 : 259,109.82 = 72,876.60 : x
  2. Step 2: Convert to fraction form
    172,716.39/259,109.82 = 72,876.60/x
  3. Step 3: Cross multiply
    172,716.39x = 259,109.82 × 72,876.60
  4. Step 4: Simplify right side
    172,716.39x = 18,883,042,708.21
  5. Step 5: Solve for x
    x = 18,883,042,708.21/172,716.39
  6. Step 6: Final answer
    x = 109,329.77

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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.