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Finding the Fourth Proportional to 192,885.30, 289,206.45 and 80,643.60

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Solution

The fourth proportional to 192,885.30, 289,206.45 and 80,643.60 is: 120,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,885.30 : 289,206.45 = 80,643.60 : x
  2. Step 2: Convert to fraction form
    192,885.30/289,206.45 = 80,643.60/x
  3. Step 3: Cross multiply
    192,885.30x = 289,206.45 × 80,643.60
  4. Step 4: Simplify right side
    192,885.30x = 23,322,649,271.22
  5. Step 5: Solve for x
    x = 23,322,649,271.22/192,885.30
  6. Step 6: Final answer
    x = 120,914.60

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1.5x scale

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.