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Finding the Fourth Proportional to 67,208.38, 100,783.38 and 20,450.32

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Solution

The fourth proportional to 67,208.38, 100,783.38 and 20,450.32 is: 30,666.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,208.38 : 100,783.38 = 20,450.32 : x
  2. Step 2: Convert to fraction form
    67,208.38/100,783.38 = 20,450.32/x
  3. Step 3: Cross multiply
    67,208.38x = 100,783.38 × 20,450.32
  4. Step 4: Simplify right side
    67,208.38x = 2,061,052,371.68
  5. Step 5: Solve for x
    x = 2,061,052,371.68/67,208.38
  6. Step 6: Final answer
    x = 30,666.60

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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.