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Finding the Fourth Proportional to 117,189.78, 161,742.60 and 69,469.44

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Solution

The fourth proportional to 117,189.78, 161,742.60 and 69,469.44 is: 95,880.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,189.78 : 161,742.60 = 69,469.44 : x
  2. Step 2: Convert to fraction form
    117,189.78/161,742.60 = 69,469.44/x
  3. Step 3: Cross multiply
    117,189.78x = 161,742.60 × 69,469.44
  4. Step 4: Simplify right side
    117,189.78x = 11,236,167,846.14
  5. Step 5: Solve for x
    x = 11,236,167,846.14/117,189.78
  6. Step 6: Final answer
    x = 95,880.10

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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.