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Finding the Fourth Proportional to 149,796.58, 206,718.21 and 81,813.55

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Solution

The fourth proportional to 149,796.58, 206,718.21 and 81,813.55 is: 112,902.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,796.58 : 206,718.21 = 81,813.55 : x
  2. Step 2: Convert to fraction form
    149,796.58/206,718.21 = 81,813.55/x
  3. Step 3: Cross multiply
    149,796.58x = 206,718.21 × 81,813.55
  4. Step 4: Simplify right side
    149,796.58x = 16,912,350,609.75
  5. Step 5: Solve for x
    x = 16,912,350,609.75/149,796.58
  6. Step 6: Final answer
    x = 112,902.11

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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.