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Finding the Fourth Proportional to 140,405.58, 193,759.42 and 79,976.20

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Solution

The fourth proportional to 140,405.58, 193,759.42 and 79,976.20 is: 110,367.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,405.58 : 193,759.42 = 79,976.20 : x
  2. Step 2: Convert to fraction form
    140,405.58/193,759.42 = 79,976.20/x
  3. Step 3: Cross multiply
    140,405.58x = 193,759.42 × 79,976.20
  4. Step 4: Simplify right side
    140,405.58x = 15,496,142,125.80
  5. Step 5: Solve for x
    x = 15,496,142,125.80/140,405.58
  6. Step 6: Final answer
    x = 110,367.00

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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.