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Finding the Fourth Proportional to 111,205.40, 166,808.10 and 66,809.30

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Solution

The fourth proportional to 111,205.40, 166,808.10 and 66,809.30 is: 100,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,205.40 : 166,808.10 = 66,809.30 : x
  2. Step 2: Convert to fraction form
    111,205.40/166,808.10 = 66,809.30/x
  3. Step 3: Cross multiply
    111,205.40x = 166,808.10 × 66,809.30
  4. Step 4: Simplify right side
    111,205.40x = 11,144,332,395.33
  5. Step 5: Solve for x
    x = 11,144,332,395.33/111,205.40
  6. Step 6: Final answer
    x = 100,213.95

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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.