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Finding the Fourth Proportional to 89,136.60, 133,704.90 and 76,014.60

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Solution

The fourth proportional to 89,136.60, 133,704.90 and 76,014.60 is: 114,021.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,136.60 : 133,704.90 = 76,014.60 : x
  2. Step 2: Convert to fraction form
    89,136.60/133,704.90 = 76,014.60/x
  3. Step 3: Cross multiply
    89,136.60x = 133,704.90 × 76,014.60
  4. Step 4: Simplify right side
    89,136.60x = 10,163,524,491.54
  5. Step 5: Solve for x
    x = 10,163,524,491.54/89,136.60
  6. Step 6: Final answer
    x = 114,021.90

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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.