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Finding the Fourth Proportional to 73,247.66, 109,861.74 and 20,661.38

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Solution

The fourth proportional to 73,247.66, 109,861.74 and 20,661.38 is: 30,989.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,247.66 : 109,861.74 = 20,661.38 : x
  2. Step 2: Convert to fraction form
    73,247.66/109,861.74 = 20,661.38/x
  3. Step 3: Cross multiply
    73,247.66x = 109,861.74 × 20,661.38
  4. Step 4: Simplify right side
    73,247.66x = 2,269,895,157.60
  5. Step 5: Solve for x
    x = 2,269,895,157.60/73,247.66
  6. Step 6: Final answer
    x = 30,989.32

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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.