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Finding the Fourth Proportional to 61,644.12, 92,020.16 and 54,170.68

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Solution

The fourth proportional to 61,644.12, 92,020.16 and 54,170.68 is: 80,864.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,644.12 : 92,020.16 = 54,170.68 : x
  2. Step 2: Convert to fraction form
    61,644.12/92,020.16 = 54,170.68/x
  3. Step 3: Cross multiply
    61,644.12x = 92,020.16 × 54,170.68
  4. Step 4: Simplify right side
    61,644.12x = 4,984,794,640.91
  5. Step 5: Solve for x
    x = 4,984,794,640.91/61,644.12
  6. Step 6: Final answer
    x = 80,864.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.