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Finding the Fourth Proportional to 190,438.80, 285,705.43 and 134,388.42

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Solution

The fourth proportional to 190,438.80, 285,705.43 and 134,388.42 is: 201,615.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,438.80 : 285,705.43 = 134,388.42 : x
  2. Step 2: Convert to fraction form
    190,438.80/285,705.43 = 134,388.42/x
  3. Step 3: Cross multiply
    190,438.80x = 285,705.43 × 134,388.42
  4. Step 4: Simplify right side
    190,438.80x = 38,395,499,915.75
  5. Step 5: Solve for x
    x = 38,395,499,915.75/190,438.80
  6. Step 6: Final answer
    x = 201,615.96

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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.