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Finding the Fourth Proportional to 129,164.80, 193,747.20 and 99,640.30

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Solution

The fourth proportional to 129,164.80, 193,747.20 and 99,640.30 is: 149,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,164.80 : 193,747.20 = 99,640.30 : x
  2. Step 2: Convert to fraction form
    129,164.80/193,747.20 = 99,640.30/x
  3. Step 3: Cross multiply
    129,164.80x = 193,747.20 × 99,640.30
  4. Step 4: Simplify right side
    129,164.80x = 19,305,029,132.16
  5. Step 5: Solve for x
    x = 19,305,029,132.16/129,164.80
  6. Step 6: Final answer
    x = 149,460.45

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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.