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Finding the Fourth Proportional to 68,820.46, 103,160.97 and 46,636.08

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Solution

The fourth proportional to 68,820.46, 103,160.97 and 46,636.08 is: 69,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,820.46 : 103,160.97 = 46,636.08 : x
  2. Step 2: Convert to fraction form
    68,820.46/103,160.97 = 46,636.08/x
  3. Step 3: Cross multiply
    68,820.46x = 103,160.97 × 46,636.08
  4. Step 4: Simplify right side
    68,820.46x = 4,811,023,249.80
  5. Step 5: Solve for x
    x = 4,811,023,249.80/68,820.46
  6. Step 6: Final answer
    x = 69,906.87

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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.