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Finding the Fourth Proportional to 443,781.96, 665,706.96 and 128,241.60

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Solution

The fourth proportional to 443,781.96, 665,706.96 and 128,241.60 is: 192,372.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,781.96 : 665,706.96 = 128,241.60 : x
  2. Step 2: Convert to fraction form
    443,781.96/665,706.96 = 128,241.60/x
  3. Step 3: Cross multiply
    443,781.96x = 665,706.96 × 128,241.60
  4. Step 4: Simplify right side
    443,781.96x = 85,371,325,681.54
  5. Step 5: Solve for x
    x = 85,371,325,681.54/443,781.96
  6. Step 6: Final answer
    x = 192,372.23

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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.