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Finding the Fourth Proportional to 189,356.99, 261,320.99 and 108,809.78

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Solution

The fourth proportional to 189,356.99, 261,320.99 and 108,809.78 is: 150,162.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,356.99 : 261,320.99 = 108,809.78 : x
  2. Step 2: Convert to fraction form
    189,356.99/261,320.99 = 108,809.78/x
  3. Step 3: Cross multiply
    189,356.99x = 261,320.99 × 108,809.78
  4. Step 4: Simplify right side
    189,356.99x = 28,434,279,050.56
  5. Step 5: Solve for x
    x = 28,434,279,050.56/189,356.99
  6. Step 6: Final answer
    x = 150,162.29

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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.