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Finding the Fourth Proportional to 92,891.88, 139,385.82 and 46,143.72

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Solution

The fourth proportional to 92,891.88, 139,385.82 and 46,143.72 is: 69,239.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,891.88 : 139,385.82 = 46,143.72 : x
  2. Step 2: Convert to fraction form
    92,891.88/139,385.82 = 46,143.72/x
  3. Step 3: Cross multiply
    92,891.88x = 139,385.82 × 46,143.72
  4. Step 4: Simplify right side
    92,891.88x = 6,431,780,250.05
  5. Step 5: Solve for x
    x = 6,431,780,250.05/92,891.88
  6. Step 6: Final answer
    x = 69,239.42

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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.