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Finding the Fourth Proportional to 70,190.81, 96,863.16 and 39,976.13

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Solution

The fourth proportional to 70,190.81, 96,863.16 and 39,976.13 is: 55,166.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,190.81 : 96,863.16 = 39,976.13 : x
  2. Step 2: Convert to fraction form
    70,190.81/96,863.16 = 39,976.13/x
  3. Step 3: Cross multiply
    70,190.81x = 96,863.16 × 39,976.13
  4. Step 4: Simplify right side
    70,190.81x = 3,872,214,276.37
  5. Step 5: Solve for x
    x = 3,872,214,276.37/70,190.81
  6. Step 6: Final answer
    x = 55,166.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.