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Finding the Fourth Proportional to 191,620.38, 287,305.41 and 91,777.38

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Solution

The fourth proportional to 191,620.38, 287,305.41 and 91,777.38 is: 137,606.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,620.38 : 287,305.41 = 91,777.38 : x
  2. Step 2: Convert to fraction form
    191,620.38/287,305.41 = 91,777.38/x
  3. Step 3: Cross multiply
    191,620.38x = 287,305.41 × 91,777.38
  4. Step 4: Simplify right side
    191,620.38x = 26,368,137,789.63
  5. Step 5: Solve for x
    x = 26,368,137,789.63/191,620.38
  6. Step 6: Final answer
    x = 137,606.12

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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.