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Finding the Fourth Proportional to 69,921.69, 96,491.90 and 38,090.58

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Solution

The fourth proportional to 69,921.69, 96,491.90 and 38,090.58 is: 52,564.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,921.69 : 96,491.90 = 38,090.58 : x
  2. Step 2: Convert to fraction form
    69,921.69/96,491.90 = 38,090.58/x
  3. Step 3: Cross multiply
    69,921.69x = 96,491.90 × 38,090.58
  4. Step 4: Simplify right side
    69,921.69x = 3,675,432,245.85
  5. Step 5: Solve for x
    x = 3,675,432,245.85/69,921.69
  6. Step 6: Final answer
    x = 52,564.98

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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.