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Finding the Fourth Proportional to 188,859.28, 260,626.80 and 103,976.40

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Solution

The fourth proportional to 188,859.28, 260,626.80 and 103,976.40 is: 143,487.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,859.28 : 260,626.80 = 103,976.40 : x
  2. Step 2: Convert to fraction form
    188,859.28/260,626.80 = 103,976.40/x
  3. Step 3: Cross multiply
    188,859.28x = 260,626.80 × 103,976.40
  4. Step 4: Simplify right side
    188,859.28x = 27,099,036,407.52
  5. Step 5: Solve for x
    x = 27,099,036,407.52/188,859.28
  6. Step 6: Final answer
    x = 143,487.98

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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.