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Finding the Fourth Proportional to 48,716.70, 73,019.66 and 20,619.21

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Solution

The fourth proportional to 48,716.70, 73,019.66 and 20,619.21 is: 30,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,716.70 : 73,019.66 = 20,619.21 : x
  2. Step 2: Convert to fraction form
    48,716.70/73,019.66 = 20,619.21/x
  3. Step 3: Cross multiply
    48,716.70x = 73,019.66 × 20,619.21
  4. Step 4: Simplify right side
    48,716.70x = 1,505,607,600.57
  5. Step 5: Solve for x
    x = 1,505,607,600.57/48,716.70
  6. Step 6: Final answer
    x = 30,905.37

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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.