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Finding the Fourth Proportional to 147,593.72, 203,745.30 and 99,991.64

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Solution

The fourth proportional to 147,593.72, 203,745.30 and 99,991.64 is: 138,033.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,593.72 : 203,745.30 = 99,991.64 : x
  2. Step 2: Convert to fraction form
    147,593.72/203,745.30 = 99,991.64/x
  3. Step 3: Cross multiply
    147,593.72x = 203,745.30 × 99,991.64
  4. Step 4: Simplify right side
    147,593.72x = 20,372,826,689.29
  5. Step 5: Solve for x
    x = 20,372,826,689.29/147,593.72
  6. Step 6: Final answer
    x = 138,033.15

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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.