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Finding the Fourth Proportional to 79,716.43, 119,581.53 and 20,551.60

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Solution

The fourth proportional to 79,716.43, 119,581.53 and 20,551.60 is: 30,829.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,716.43 : 119,581.53 = 20,551.60 : x
  2. Step 2: Convert to fraction form
    79,716.43/119,581.53 = 20,551.60/x
  3. Step 3: Cross multiply
    79,716.43x = 119,581.53 × 20,551.60
  4. Step 4: Simplify right side
    79,716.43x = 2,457,591,921.42
  5. Step 5: Solve for x
    x = 2,457,591,921.42/79,716.43
  6. Step 6: Final answer
    x = 30,829.18

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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.