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Finding the Fourth Proportional to 353,143.60, 529,715.40 and 128,757.40

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Solution

The fourth proportional to 353,143.60, 529,715.40 and 128,757.40 is: 193,136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,143.60 : 529,715.40 = 128,757.40 : x
  2. Step 2: Convert to fraction form
    353,143.60/529,715.40 = 128,757.40/x
  3. Step 3: Cross multiply
    353,143.60x = 529,715.40 × 128,757.40
  4. Step 4: Simplify right side
    353,143.60x = 68,204,777,643.96
  5. Step 5: Solve for x
    x = 68,204,777,643.96/353,143.60
  6. Step 6: Final answer
    x = 193,136.10

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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.