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Finding the Fourth Proportional to 67,228.63, 100,842.95 and 20,481.50

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Solution

The fourth proportional to 67,228.63, 100,842.95 and 20,481.50 is: 30,722.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,228.63 : 100,842.95 = 20,481.50 : x
  2. Step 2: Convert to fraction form
    67,228.63/100,842.95 = 20,481.50/x
  3. Step 3: Cross multiply
    67,228.63x = 100,842.95 × 20,481.50
  4. Step 4: Simplify right side
    67,228.63x = 2,065,414,778.02
  5. Step 5: Solve for x
    x = 2,065,414,778.02/67,228.63
  6. Step 6: Final answer
    x = 30,722.25

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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.