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Finding the Fourth Proportional to 74,406, 111,629.22 and 21,815.04

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Solution

The fourth proportional to 74,406, 111,629.22 and 21,815.04 is: 32,728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,406 : 111,629.22 = 21,815.04 : x
  2. Step 2: Convert to fraction form
    74,406/111,629.22 = 21,815.04/x
  3. Step 3: Cross multiply
    74,406x = 111,629.22 × 21,815.04
  4. Step 4: Simplify right side
    74,406x = 2,435,195,899.47
  5. Step 5: Solve for x
    x = 2,435,195,899.47/74,406
  6. Step 6: Final answer
    x = 32,728.49

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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.