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Finding the Fourth Proportional to 70,240.86, 105,311.97 and 25,861.95

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Solution

The fourth proportional to 70,240.86, 105,311.97 and 25,861.95 is: 38,774.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,240.86 : 105,311.97 = 25,861.95 : x
  2. Step 2: Convert to fraction form
    70,240.86/105,311.97 = 25,861.95/x
  3. Step 3: Cross multiply
    70,240.86x = 105,311.97 × 25,861.95
  4. Step 4: Simplify right side
    70,240.86x = 2,723,572,902.54
  5. Step 5: Solve for x
    x = 2,723,572,902.54/70,240.86
  6. Step 6: Final answer
    x = 38,774.77

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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.