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Finding the Fourth Proportional to 128,866.60, 193,299.90 and 89,500.60

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Solution

The fourth proportional to 128,866.60, 193,299.90 and 89,500.60 is: 134,250.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,866.60 : 193,299.90 = 89,500.60 : x
  2. Step 2: Convert to fraction form
    128,866.60/193,299.90 = 89,500.60/x
  3. Step 3: Cross multiply
    128,866.60x = 193,299.90 × 89,500.60
  4. Step 4: Simplify right side
    128,866.60x = 17,300,457,029.94
  5. Step 5: Solve for x
    x = 17,300,457,029.94/128,866.60
  6. Step 6: Final answer
    x = 134,250.90

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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.