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Finding the Fourth Proportional to 68,709.21, 103,039.53 and 32,681.43

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Solution

The fourth proportional to 68,709.21, 103,039.53 and 32,681.43 is: 49,010.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,709.21 : 103,039.53 = 32,681.43 : x
  2. Step 2: Convert to fraction form
    68,709.21/103,039.53 = 32,681.43/x
  3. Step 3: Cross multiply
    68,709.21x = 103,039.53 × 32,681.43
  4. Step 4: Simplify right side
    68,709.21x = 3,367,479,186.93
  5. Step 5: Solve for x
    x = 3,367,479,186.93/68,709.21
  6. Step 6: Final answer
    x = 49,010.59

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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.