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Finding the Fourth Proportional to 70,639.83, 105,856.07 and 35,531.19

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Solution

The fourth proportional to 70,639.83, 105,856.07 and 35,531.19 is: 53,244.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,639.83 : 105,856.07 = 35,531.19 : x
  2. Step 2: Convert to fraction form
    70,639.83/105,856.07 = 35,531.19/x
  3. Step 3: Cross multiply
    70,639.83x = 105,856.07 × 35,531.19
  4. Step 4: Simplify right side
    70,639.83x = 3,761,191,958.17
  5. Step 5: Solve for x
    x = 3,761,191,958.17/70,639.83
  6. Step 6: Final answer
    x = 53,244.63

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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.