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Finding the Fourth Proportional to 117,138.48, 161,662.68 and 66,845.04

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Solution

The fourth proportional to 117,138.48, 161,662.68 and 66,845.04 is: 92,252.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,138.48 : 161,662.68 = 66,845.04 : x
  2. Step 2: Convert to fraction form
    117,138.48/161,662.68 = 66,845.04/x
  3. Step 3: Cross multiply
    117,138.48x = 161,662.68 × 66,845.04
  4. Step 4: Simplify right side
    117,138.48x = 10,806,348,311.11
  5. Step 5: Solve for x
    x = 10,806,348,311.11/117,138.48
  6. Step 6: Final answer
    x = 92,252.76

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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.