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Finding the Fourth Proportional to 154,197.80, 212,794.30 and 85,286.11

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Solution

The fourth proportional to 154,197.80, 212,794.30 and 85,286.11 is: 117,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,197.80 : 212,794.30 = 85,286.11 : x
  2. Step 2: Convert to fraction form
    154,197.80/212,794.30 = 85,286.11/x
  3. Step 3: Cross multiply
    154,197.80x = 212,794.30 × 85,286.11
  4. Step 4: Simplify right side
    154,197.80x = 18,148,397,065.98
  5. Step 5: Solve for x
    x = 18,148,397,065.98/154,197.80
  6. Step 6: Final answer
    x = 117,695.56

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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.