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Finding the Fourth Proportional to 121,043.25, 167,039.69 and 68,051.25

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Solution

The fourth proportional to 121,043.25, 167,039.69 and 68,051.25 is: 93,910.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,043.25 : 167,039.69 = 68,051.25 : x
  2. Step 2: Convert to fraction form
    121,043.25/167,039.69 = 68,051.25/x
  3. Step 3: Cross multiply
    121,043.25x = 167,039.69 × 68,051.25
  4. Step 4: Simplify right side
    121,043.25x = 11,367,259,363.86
  5. Step 5: Solve for x
    x = 11,367,259,363.86/121,043.25
  6. Step 6: Final answer
    x = 93,910.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.