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Finding the Fourth Proportional to 61,986, 85,540.36 and 33,691.84

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Solution

The fourth proportional to 61,986, 85,540.36 and 33,691.84 is: 46,494.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,986 : 85,540.36 = 33,691.84 : x
  2. Step 2: Convert to fraction form
    61,986/85,540.36 = 33,691.84/x
  3. Step 3: Cross multiply
    61,986x = 85,540.36 × 33,691.84
  4. Step 4: Simplify right side
    61,986x = 2,882,012,122.66
  5. Step 5: Solve for x
    x = 2,882,012,122.66/61,986
  6. Step 6: Final answer
    x = 46,494.57

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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.