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Finding the Fourth Proportional to 117,197.81, 161,723.39 and 66,214.97

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Solution

The fourth proportional to 117,197.81, 161,723.39 and 66,214.97 is: 91,371.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,197.81 : 161,723.39 = 66,214.97 : x
  2. Step 2: Convert to fraction form
    117,197.81/161,723.39 = 66,214.97/x
  3. Step 3: Cross multiply
    117,197.81x = 161,723.39 × 66,214.97
  4. Step 4: Simplify right side
    117,197.81x = 10,708,508,883.92
  5. Step 5: Solve for x
    x = 10,708,508,883.92/117,197.81
  6. Step 6: Final answer
    x = 91,371.24

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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.