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Finding the Fourth Proportional to 133,469.85, 184,388.39 and 87,638.20

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Solution

The fourth proportional to 133,469.85, 184,388.39 and 87,638.20 is: 121,072.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,469.85 : 184,388.39 = 87,638.20 : x
  2. Step 2: Convert to fraction form
    133,469.85/184,388.39 = 87,638.20/x
  3. Step 3: Cross multiply
    133,469.85x = 184,388.39 × 87,638.20
  4. Step 4: Simplify right side
    133,469.85x = 16,159,466,600.50
  5. Step 5: Solve for x
    x = 16,159,466,600.50/133,469.85
  6. Step 6: Final answer
    x = 121,072.04

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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.