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Finding the Fourth Proportional to 61,472.72, 92,107.18 and 21,470.21

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Solution

The fourth proportional to 61,472.72, 92,107.18 and 21,470.21 is: 32,169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,472.72 : 92,107.18 = 21,470.21 : x
  2. Step 2: Convert to fraction form
    61,472.72/92,107.18 = 21,470.21/x
  3. Step 3: Cross multiply
    61,472.72x = 92,107.18 × 21,470.21
  4. Step 4: Simplify right side
    61,472.72x = 1,977,560,806.14
  5. Step 5: Solve for x
    x = 1,977,560,806.14/61,472.72
  6. Step 6: Final answer
    x = 32,169.73

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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.