Home / 189,690.72-261,699.84-109,105.44

Finding the Fourth Proportional to 189,690.72, 261,699.84 and 109,105.44

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Solution

The fourth proportional to 189,690.72, 261,699.84 and 109,105.44 is: 150,523.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,690.72 : 261,699.84 = 109,105.44 : x
  2. Step 2: Convert to fraction form
    189,690.72/261,699.84 = 109,105.44/x
  3. Step 3: Cross multiply
    189,690.72x = 261,699.84 × 109,105.44
  4. Step 4: Simplify right side
    189,690.72x = 28,552,876,191.13
  5. Step 5: Solve for x
    x = 28,552,876,191.13/189,690.72
  6. Step 6: Final answer
    x = 150,523.32

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1.5x scale

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.