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Finding the Fourth Proportional to 128,183.77, 192,278.76 and 39,438.01

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Solution

The fourth proportional to 128,183.77, 192,278.76 and 39,438.01 is: 59,157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,183.77 : 192,278.76 = 39,438.01 : x
  2. Step 2: Convert to fraction form
    128,183.77/192,278.76 = 39,438.01/x
  3. Step 3: Cross multiply
    128,183.77x = 192,278.76 × 39,438.01
  4. Step 4: Simplify right side
    128,183.77x = 7,583,091,659.67
  5. Step 5: Solve for x
    x = 7,583,091,659.67/128,183.77
  6. Step 6: Final answer
    x = 59,157.97

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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.