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Finding the Fourth Proportional to 191,797.80, 287,696.72 and 85,156.68

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Solution

The fourth proportional to 191,797.80, 287,696.72 and 85,156.68 is: 127,735.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,797.80 : 287,696.72 = 85,156.68 : x
  2. Step 2: Convert to fraction form
    191,797.80/287,696.72 = 85,156.68/x
  3. Step 3: Cross multiply
    191,797.80x = 287,696.72 × 85,156.68
  4. Step 4: Simplify right side
    191,797.80x = 24,499,297,522.09
  5. Step 5: Solve for x
    x = 24,499,297,522.09/191,797.80
  6. Step 6: Final answer
    x = 127,735.03

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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.