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Finding the Fourth Proportional to 86,611.44, 129,930.78 and 36,691.86

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Solution

The fourth proportional to 86,611.44, 129,930.78 and 36,691.86 is: 55,043.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,611.44 : 129,930.78 = 36,691.86 : x
  2. Step 2: Convert to fraction form
    86,611.44/129,930.78 = 36,691.86/x
  3. Step 3: Cross multiply
    86,611.44x = 129,930.78 × 36,691.86
  4. Step 4: Simplify right side
    86,611.44x = 4,767,401,989.45
  5. Step 5: Solve for x
    x = 4,767,401,989.45/86,611.44
  6. Step 6: Final answer
    x = 55,043.56

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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.