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Finding the Fourth Proportional to 70,586.62, 105,893.49 and 28,470.97

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Solution

The fourth proportional to 70,586.62, 105,893.49 and 28,470.97 is: 42,711.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,586.62 : 105,893.49 = 28,470.97 : x
  2. Step 2: Convert to fraction form
    70,586.62/105,893.49 = 28,470.97/x
  3. Step 3: Cross multiply
    70,586.62x = 105,893.49 × 28,470.97
  4. Step 4: Simplify right side
    70,586.62x = 3,014,890,376.99
  5. Step 5: Solve for x
    x = 3,014,890,376.99/70,586.62
  6. Step 6: Final answer
    x = 42,711.92

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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.