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Finding the Fourth Proportional to 128,383.63, 192,621.04 and 57,299.81

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Solution

The fourth proportional to 128,383.63, 192,621.04 and 57,299.81 is: 85,970.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.63 : 192,621.04 = 57,299.81 : x
  2. Step 2: Convert to fraction form
    128,383.63/192,621.04 = 57,299.81/x
  3. Step 3: Cross multiply
    128,383.63x = 192,621.04 × 57,299.81
  4. Step 4: Simplify right side
    128,383.63x = 11,037,147,887.65
  5. Step 5: Solve for x
    x = 11,037,147,887.65/128,383.63
  6. Step 6: Final answer
    x = 85,970.05

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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.