Home / 74,078.64-111,105-21,495.60

Finding the Fourth Proportional to 74,078.64, 111,105 and 21,495.60

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Solution

The fourth proportional to 74,078.64, 111,105 and 21,495.60 is: 32,239.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,078.64 : 111,105 = 21,495.60 : x
  2. Step 2: Convert to fraction form
    74,078.64/111,105 = 21,495.60/x
  3. Step 3: Cross multiply
    74,078.64x = 111,105 × 21,495.60
  4. Step 4: Simplify right side
    74,078.64x = 2,388,268,638
  5. Step 5: Solve for x
    x = 2,388,268,638/74,078.64
  6. Step 6: Final answer
    x = 32,239.64

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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.