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Finding the Fourth Proportional to 117,326.96, 161,920.56 and 66,350.42

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Solution

The fourth proportional to 117,326.96, 161,920.56 and 66,350.42 is: 91,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,326.96 : 161,920.56 = 66,350.42 : x
  2. Step 2: Convert to fraction form
    117,326.96/161,920.56 = 66,350.42/x
  3. Step 3: Cross multiply
    117,326.96x = 161,920.56 × 66,350.42
  4. Step 4: Simplify right side
    117,326.96x = 10,743,496,353.03
  5. Step 5: Solve for x
    x = 10,743,496,353.03/117,326.96
  6. Step 6: Final answer
    x = 91,568.87

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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.