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Finding the Fourth Proportional to 141,691, 195,533.60 and 78,028.68

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Solution

The fourth proportional to 141,691, 195,533.60 and 78,028.68 is: 107,679.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,691 : 195,533.60 = 78,028.68 : x
  2. Step 2: Convert to fraction form
    141,691/195,533.60 = 78,028.68/x
  3. Step 3: Cross multiply
    141,691x = 195,533.60 × 78,028.68
  4. Step 4: Simplify right side
    141,691x = 15,257,228,703.65
  5. Step 5: Solve for x
    x = 15,257,228,703.65/141,691
  6. Step 6: Final answer
    x = 107,679.59

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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.