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Finding the Fourth Proportional to 128,608.62, 192,757.41 and 66,245.10

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Solution

The fourth proportional to 128,608.62, 192,757.41 and 66,245.10 is: 99,287.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,608.62 : 192,757.41 = 66,245.10 : x
  2. Step 2: Convert to fraction form
    128,608.62/192,757.41 = 66,245.10/x
  3. Step 3: Cross multiply
    128,608.62x = 192,757.41 × 66,245.10
  4. Step 4: Simplify right side
    128,608.62x = 12,769,233,901.19
  5. Step 5: Solve for x
    x = 12,769,233,901.19/128,608.62
  6. Step 6: Final answer
    x = 99,287.54

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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.