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Finding the Fourth Proportional to 199,616.40, 299,424.60 and 128,757.60

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Solution

The fourth proportional to 199,616.40, 299,424.60 and 128,757.60 is: 193,136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,616.40 : 299,424.60 = 128,757.60 : x
  2. Step 2: Convert to fraction form
    199,616.40/299,424.60 = 128,757.60/x
  3. Step 3: Cross multiply
    199,616.40x = 299,424.60 × 128,757.60
  4. Step 4: Simplify right side
    199,616.40x = 38,553,192,876.96
  5. Step 5: Solve for x
    x = 38,553,192,876.96/199,616.40
  6. Step 6: Final answer
    x = 193,136.40

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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.