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Finding the Fourth Proportional to 89,612, 134,418 and 31,244

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Solution

The fourth proportional to 89,612, 134,418 and 31,244 is: 46,866

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,612 : 134,418 = 31,244 : x
  2. Step 2: Convert to fraction form
    89,612/134,418 = 31,244/x
  3. Step 3: Cross multiply
    89,612x = 134,418 × 31,244
  4. Step 4: Simplify right side
    89,612x = 4,199,755,992
  5. Step 5: Solve for x
    x = 4,199,755,992/89,612
  6. Step 6: Final answer
    x = 46,866

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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.