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Finding the Fourth Proportional to 67,285.44, 100,928.16 and 20,535.84

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Solution

The fourth proportional to 67,285.44, 100,928.16 and 20,535.84 is: 30,803.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,285.44 : 100,928.16 = 20,535.84 : x
  2. Step 2: Convert to fraction form
    67,285.44/100,928.16 = 20,535.84/x
  3. Step 3: Cross multiply
    67,285.44x = 100,928.16 × 20,535.84
  4. Step 4: Simplify right side
    67,285.44x = 2,072,644,545.25
  5. Step 5: Solve for x
    x = 2,072,644,545.25/67,285.44
  6. Step 6: Final answer
    x = 30,803.76

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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.