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Finding the Fourth Proportional to 190,604.30, 285,906.45 and 85,628.30

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Solution

The fourth proportional to 190,604.30, 285,906.45 and 85,628.30 is: 128,442.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,604.30 : 285,906.45 = 85,628.30 : x
  2. Step 2: Convert to fraction form
    190,604.30/285,906.45 = 85,628.30/x
  3. Step 3: Cross multiply
    190,604.30x = 285,906.45 × 85,628.30
  4. Step 4: Simplify right side
    190,604.30x = 24,481,683,272.54
  5. Step 5: Solve for x
    x = 24,481,683,272.54/190,604.30
  6. Step 6: Final answer
    x = 128,442.45

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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.