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Finding the Fourth Proportional to 128,705.43, 193,083.86 and 44,468.67

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Solution

The fourth proportional to 128,705.43, 193,083.86 and 44,468.67 is: 66,711.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,705.43 : 193,083.86 = 44,468.67 : x
  2. Step 2: Convert to fraction form
    128,705.43/193,083.86 = 44,468.67/x
  3. Step 3: Cross multiply
    128,705.43x = 193,083.86 × 44,468.67
  4. Step 4: Simplify right side
    128,705.43x = 8,586,182,452.67
  5. Step 5: Solve for x
    x = 8,586,182,452.67/128,705.43
  6. Step 6: Final answer
    x = 66,711.89

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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.