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Finding the Fourth Proportional to 106,586.20, 159,879.30 and 66,928.60

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Solution

The fourth proportional to 106,586.20, 159,879.30 and 66,928.60 is: 100,392.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,586.20 : 159,879.30 = 66,928.60 : x
  2. Step 2: Convert to fraction form
    106,586.20/159,879.30 = 66,928.60/x
  3. Step 3: Cross multiply
    106,586.20x = 159,879.30 × 66,928.60
  4. Step 4: Simplify right side
    106,586.20x = 10,700,497,717.98
  5. Step 5: Solve for x
    x = 10,700,497,717.98/106,586.20
  6. Step 6: Final answer
    x = 100,392.90

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1.5x scale

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.