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Finding the Fourth Proportional to 165,636.56, 248,353.56 and 81,289.64

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Solution

The fourth proportional to 165,636.56, 248,353.56 and 81,289.64 is: 121,884.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,636.56 : 248,353.56 = 81,289.64 : x
  2. Step 2: Convert to fraction form
    165,636.56/248,353.56 = 81,289.64/x
  3. Step 3: Cross multiply
    165,636.56x = 248,353.56 × 81,289.64
  4. Step 4: Simplify right side
    165,636.56x = 20,188,571,485.12
  5. Step 5: Solve for x
    x = 20,188,571,485.12/165,636.56
  6. Step 6: Final answer
    x = 121,884.75

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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.