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Finding the Fourth Proportional to 70,236.91, 105,306.08 and 25,857.98

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Solution

The fourth proportional to 70,236.91, 105,306.08 and 25,857.98 is: 38,768.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,236.91 : 105,306.08 = 25,857.98 : x
  2. Step 2: Convert to fraction form
    70,236.91/105,306.08 = 25,857.98/x
  3. Step 3: Cross multiply
    70,236.91x = 105,306.08 × 25,857.98
  4. Step 4: Simplify right side
    70,236.91x = 2,723,001,854.70
  5. Step 5: Solve for x
    x = 2,723,001,854.70/70,236.91
  6. Step 6: Final answer
    x = 38,768.82

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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.