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Finding the Fourth Proportional to 189,940.80, 284,911.20 and 111,014.40

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Solution

The fourth proportional to 189,940.80, 284,911.20 and 111,014.40 is: 166,521.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,940.80 : 284,911.20 = 111,014.40 : x
  2. Step 2: Convert to fraction form
    189,940.80/284,911.20 = 111,014.40/x
  3. Step 3: Cross multiply
    189,940.80x = 284,911.20 × 111,014.40
  4. Step 4: Simplify right side
    189,940.80x = 31,629,245,921.28
  5. Step 5: Solve for x
    x = 31,629,245,921.28/189,940.80
  6. Step 6: Final answer
    x = 166,521.60

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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.