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Finding the Fourth Proportional to 92,618.94, 138,780.78 and 59,311.60

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Solution

The fourth proportional to 92,618.94, 138,780.78 and 59,311.60 is: 88,872.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,618.94 : 138,780.78 = 59,311.60 : x
  2. Step 2: Convert to fraction form
    92,618.94/138,780.78 = 59,311.60/x
  3. Step 3: Cross multiply
    92,618.94x = 138,780.78 × 59,311.60
  4. Step 4: Simplify right side
    92,618.94x = 8,231,310,111.05
  5. Step 5: Solve for x
    x = 8,231,310,111.05/92,618.94
  6. Step 6: Final answer
    x = 88,872.86

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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.