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Finding the Fourth Proportional to 129,182.70, 193,569.39 and 99,672.78

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Solution

The fourth proportional to 129,182.70, 193,569.39 and 99,672.78 is: 149,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,182.70 : 193,569.39 = 99,672.78 : x
  2. Step 2: Convert to fraction form
    129,182.70/193,569.39 = 99,672.78/x
  3. Step 3: Cross multiply
    129,182.70x = 193,569.39 × 99,672.78
  4. Step 4: Simplify right side
    129,182.70x = 19,293,599,224.20
  5. Step 5: Solve for x
    x = 19,293,599,224.20/129,182.70
  6. Step 6: Final answer
    x = 149,351.26

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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.