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Finding the Fourth Proportional to 194,719.80, 292,194.90 and 128,351.80

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Solution

The fourth proportional to 194,719.80, 292,194.90 and 128,351.80 is: 192,603.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,719.80 : 292,194.90 = 128,351.80 : x
  2. Step 2: Convert to fraction form
    194,719.80/292,194.90 = 128,351.80/x
  3. Step 3: Cross multiply
    194,719.80x = 292,194.90 × 128,351.80
  4. Step 4: Simplify right side
    194,719.80x = 37,503,741,365.82
  5. Step 5: Solve for x
    x = 37,503,741,365.82/194,719.80
  6. Step 6: Final answer
    x = 192,603.64

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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.