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Finding the Fourth Proportional to 79,338, 119,007.44 and 20,173.71

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Solution

The fourth proportional to 79,338, 119,007.44 and 20,173.71 is: 30,260.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,338 : 119,007.44 = 20,173.71 : x
  2. Step 2: Convert to fraction form
    79,338/119,007.44 = 20,173.71/x
  3. Step 3: Cross multiply
    79,338x = 119,007.44 × 20,173.71
  4. Step 4: Simplify right side
    79,338x = 2,400,821,582.40
  5. Step 5: Solve for x
    x = 2,400,821,582.40/79,338
  6. Step 6: Final answer
    x = 30,260.68

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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.