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Finding the Fourth Proportional to 101,961.97, 140,684.85 and 61,674.86

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Solution

The fourth proportional to 101,961.97, 140,684.85 and 61,674.86 is: 85,097.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,961.97 : 140,684.85 = 61,674.86 : x
  2. Step 2: Convert to fraction form
    101,961.97/140,684.85 = 61,674.86/x
  3. Step 3: Cross multiply
    101,961.97x = 140,684.85 × 61,674.86
  4. Step 4: Simplify right side
    101,961.97x = 8,676,718,779.58
  5. Step 5: Solve for x
    x = 8,676,718,779.58/101,961.97
  6. Step 6: Final answer
    x = 85,097.60

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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.