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Finding the Fourth Proportional to 92,511.61, 138,854.43 and 87,455.54

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Solution

The fourth proportional to 92,511.61, 138,854.43 and 87,455.54 is: 131,265.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,511.61 : 138,854.43 = 87,455.54 : x
  2. Step 2: Convert to fraction form
    92,511.61/138,854.43 = 87,455.54/x
  3. Step 3: Cross multiply
    92,511.61x = 138,854.43 × 87,455.54
  4. Step 4: Simplify right side
    92,511.61x = 12,143,589,157.04
  5. Step 5: Solve for x
    x = 12,143,589,157.04/92,511.61
  6. Step 6: Final answer
    x = 131,265.57

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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.