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Finding the Fourth Proportional to 92,418.70, 138,531.57 and 67,056.94

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Solution

The fourth proportional to 92,418.70, 138,531.57 and 67,056.94 is: 100,515.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,418.70 : 138,531.57 = 67,056.94 : x
  2. Step 2: Convert to fraction form
    92,418.70/138,531.57 = 67,056.94/x
  3. Step 3: Cross multiply
    92,418.70x = 138,531.57 × 67,056.94
  4. Step 4: Simplify right side
    92,418.70x = 9,289,503,177.60
  5. Step 5: Solve for x
    x = 9,289,503,177.60/92,418.70
  6. Step 6: Final answer
    x = 100,515.41

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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.