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Finding the Fourth Proportional to 67,215.69, 92,789.15 and 38,915.91

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Solution

The fourth proportional to 67,215.69, 92,789.15 and 38,915.91 is: 53,722.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,215.69 : 92,789.15 = 38,915.91 : x
  2. Step 2: Convert to fraction form
    67,215.69/92,789.15 = 38,915.91/x
  3. Step 3: Cross multiply
    67,215.69x = 92,789.15 × 38,915.91
  4. Step 4: Simplify right side
    67,215.69x = 3,610,974,015.80
  5. Step 5: Solve for x
    x = 3,610,974,015.80/67,215.69
  6. Step 6: Final answer
    x = 53,722.19

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.