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Finding the Fourth Proportional to 190,663.74, 285,998.49 and 90,834.30

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Solution

The fourth proportional to 190,663.74, 285,998.49 and 90,834.30 is: 136,252.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,663.74 : 285,998.49 = 90,834.30 : x
  2. Step 2: Convert to fraction form
    190,663.74/285,998.49 = 90,834.30/x
  3. Step 3: Cross multiply
    190,663.74x = 285,998.49 × 90,834.30
  4. Step 4: Simplify right side
    190,663.74x = 25,978,472,640.21
  5. Step 5: Solve for x
    x = 25,978,472,640.21/190,663.74
  6. Step 6: Final answer
    x = 136,252.82

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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.