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Finding the Fourth Proportional to 275,133.60, 379,763.10 and 162,021.96

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Solution

The fourth proportional to 275,133.60, 379,763.10 and 162,021.96 is: 223,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,133.60 : 379,763.10 = 162,021.96 : x
  2. Step 2: Convert to fraction form
    275,133.60/379,763.10 = 162,021.96/x
  3. Step 3: Cross multiply
    275,133.60x = 379,763.10 × 162,021.96
  4. Step 4: Simplify right side
    275,133.60x = 61,529,961,797.68
  5. Step 5: Solve for x
    x = 61,529,961,797.68/275,133.60
  6. Step 6: Final answer
    x = 223,636.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.