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Finding the Fourth Proportional to 92,418.62, 138,636.66 and 25,858.76

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Solution

The fourth proportional to 92,418.62, 138,636.66 and 25,858.76 is: 38,790.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,418.62 : 138,636.66 = 25,858.76 : x
  2. Step 2: Convert to fraction form
    92,418.62/138,636.66 = 25,858.76/x
  3. Step 3: Cross multiply
    92,418.62x = 138,636.66 × 25,858.76
  4. Step 4: Simplify right side
    92,418.62x = 3,584,972,118.14
  5. Step 5: Solve for x
    x = 3,584,972,118.14/92,418.62
  6. Step 6: Final answer
    x = 38,790.58

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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.