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Finding the Fourth Proportional to 190,690.80, 285,906.60 and 72,344.40

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Solution

The fourth proportional to 190,690.80, 285,906.60 and 72,344.40 is: 108,467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,690.80 : 285,906.60 = 72,344.40 : x
  2. Step 2: Convert to fraction form
    190,690.80/285,906.60 = 72,344.40/x
  3. Step 3: Cross multiply
    190,690.80x = 285,906.60 × 72,344.40
  4. Step 4: Simplify right side
    190,690.80x = 20,683,741,433.04
  5. Step 5: Solve for x
    x = 20,683,741,433.04/190,690.80
  6. Step 6: Final answer
    x = 108,467.43

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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.