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Finding the Fourth Proportional to 190,601.80, 285,902.70 and 85,625.80

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Solution

The fourth proportional to 190,601.80, 285,902.70 and 85,625.80 is: 128,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,601.80 : 285,902.70 = 85,625.80 : x
  2. Step 2: Convert to fraction form
    190,601.80/285,902.70 = 85,625.80/x
  3. Step 3: Cross multiply
    190,601.80x = 285,902.70 × 85,625.80
  4. Step 4: Simplify right side
    190,601.80x = 24,480,647,409.66
  5. Step 5: Solve for x
    x = 24,480,647,409.66/190,601.80
  6. Step 6: Final answer
    x = 128,438.70

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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.