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Finding the Fourth Proportional to 70,657.01, 105,974.47 and 45,872.83

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Solution

The fourth proportional to 70,657.01, 105,974.47 and 45,872.83 is: 68,802.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,657.01 : 105,974.47 = 45,872.83 : x
  2. Step 2: Convert to fraction form
    70,657.01/105,974.47 = 45,872.83/x
  3. Step 3: Cross multiply
    70,657.01x = 105,974.47 × 45,872.83
  4. Step 4: Simplify right side
    70,657.01x = 4,861,348,846.65
  5. Step 5: Solve for x
    x = 4,861,348,846.65/70,657.01
  6. Step 6: Final answer
    x = 68,802.07

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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.