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Finding the Fourth Proportional to 86,137.70, 129,074.96 and 36,190.49

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Solution

The fourth proportional to 86,137.70, 129,074.96 and 36,190.49 is: 54,230.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,137.70 : 129,074.96 = 36,190.49 : x
  2. Step 2: Convert to fraction form
    86,137.70/129,074.96 = 36,190.49/x
  3. Step 3: Cross multiply
    86,137.70x = 129,074.96 × 36,190.49
  4. Step 4: Simplify right side
    86,137.70x = 4,671,285,494.23
  5. Step 5: Solve for x
    x = 4,671,285,494.23/86,137.70
  6. Step 6: Final answer
    x = 54,230.44

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1.5x scale

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.