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Finding the Fourth Proportional to 190,912.80, 286,369.20 and 66,253.80

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Solution

The fourth proportional to 190,912.80, 286,369.20 and 66,253.80 is: 99,380.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,912.80 : 286,369.20 = 66,253.80 : x
  2. Step 2: Convert to fraction form
    190,912.80/286,369.20 = 66,253.80/x
  3. Step 3: Cross multiply
    190,912.80x = 286,369.20 × 66,253.80
  4. Step 4: Simplify right side
    190,912.80x = 18,973,047,702.96
  5. Step 5: Solve for x
    x = 18,973,047,702.96/190,912.80
  6. Step 6: Final answer
    x = 99,380.70

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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.