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Finding the Fourth Proportional to 79,968.92, 119,701.88 and 54,862.16

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Solution

The fourth proportional to 79,968.92, 119,701.88 and 54,862.16 is: 82,120.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,968.92 : 119,701.88 = 54,862.16 : x
  2. Step 2: Convert to fraction form
    79,968.92/119,701.88 = 54,862.16/x
  3. Step 3: Cross multiply
    79,968.92x = 119,701.88 × 54,862.16
  4. Step 4: Simplify right side
    79,968.92x = 6,567,103,692.86
  5. Step 5: Solve for x
    x = 6,567,103,692.86/79,968.92
  6. Step 6: Final answer
    x = 82,120.70

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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.