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Finding the Fourth Proportional to 408,090.35, 612,134.75 and 108,571.25

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Solution

The fourth proportional to 408,090.35, 612,134.75 and 108,571.25 is: 162,856.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,090.35 : 612,134.75 = 108,571.25 : x
  2. Step 2: Convert to fraction form
    408,090.35/612,134.75 = 108,571.25/x
  3. Step 3: Cross multiply
    408,090.35x = 612,134.75 × 108,571.25
  4. Step 4: Simplify right side
    408,090.35x = 66,460,236,777.70
  5. Step 5: Solve for x
    x = 66,460,236,777.70/408,090.35
  6. Step 6: Final answer
    x = 162,856.67

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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.