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Finding the Fourth Proportional to 117,338.78, 161,912.04 and 66,358.46

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Solution

The fourth proportional to 117,338.78, 161,912.04 and 66,358.46 is: 91,565.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,338.78 : 161,912.04 = 66,358.46 : x
  2. Step 2: Convert to fraction form
    117,338.78/161,912.04 = 66,358.46/x
  3. Step 3: Cross multiply
    117,338.78x = 161,912.04 × 66,358.46
  4. Step 4: Simplify right side
    117,338.78x = 10,744,233,629.86
  5. Step 5: Solve for x
    x = 10,744,233,629.86/117,338.78
  6. Step 6: Final answer
    x = 91,565.92

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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.