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Finding the Fourth Proportional to 128,600.37, 192,900.59 and 53,679.65

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Solution

The fourth proportional to 128,600.37, 192,900.59 and 53,679.65 is: 80,519.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.37 : 192,900.59 = 53,679.65 : x
  2. Step 2: Convert to fraction form
    128,600.37/192,900.59 = 53,679.65/x
  3. Step 3: Cross multiply
    128,600.37x = 192,900.59 × 53,679.65
  4. Step 4: Simplify right side
    128,600.37x = 10,354,835,646.47
  5. Step 5: Solve for x
    x = 10,354,835,646.47/128,600.37
  6. Step 6: Final answer
    x = 80,519.48

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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.