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Finding the Fourth Proportional to 67,234.88, 100,852.34 and 20,487.80

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Solution

The fourth proportional to 67,234.88, 100,852.34 and 20,487.80 is: 30,731.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,234.88 : 100,852.34 = 20,487.80 : x
  2. Step 2: Convert to fraction form
    67,234.88/100,852.34 = 20,487.80/x
  3. Step 3: Cross multiply
    67,234.88x = 100,852.34 × 20,487.80
  4. Step 4: Simplify right side
    67,234.88x = 2,066,242,571.45
  5. Step 5: Solve for x
    x = 2,066,242,571.45/67,234.88
  6. Step 6: Final answer
    x = 30,731.71

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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.