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Finding the Fourth Proportional to 74,212, 111,324.48 and 18,808

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Solution

The fourth proportional to 74,212, 111,324.48 and 18,808 is: 28,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,212 : 111,324.48 = 18,808 : x
  2. Step 2: Convert to fraction form
    74,212/111,324.48 = 18,808/x
  3. Step 3: Cross multiply
    74,212x = 111,324.48 × 18,808
  4. Step 4: Simplify right side
    74,212x = 2,093,790,819.84
  5. Step 5: Solve for x
    x = 2,093,790,819.84/74,212
  6. Step 6: Final answer
    x = 28,213.64

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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.