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Finding the Fourth Proportional to 190,136.30, 285,219.30 and 84,965.90

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Solution

The fourth proportional to 190,136.30, 285,219.30 and 84,965.90 is: 127,455.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,136.30 : 285,219.30 = 84,965.90 : x
  2. Step 2: Convert to fraction form
    190,136.30/285,219.30 = 84,965.90/x
  3. Step 3: Cross multiply
    190,136.30x = 285,219.30 × 84,965.90
  4. Step 4: Simplify right side
    190,136.30x = 24,233,914,521.87
  5. Step 5: Solve for x
    x = 24,233,914,521.87/190,136.30
  6. Step 6: Final answer
    x = 127,455.49

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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.