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Finding the Fourth Proportional to 136,067.68, 204,064.62 and 86,072.68

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Solution

The fourth proportional to 136,067.68, 204,064.62 and 86,072.68 is: 129,085.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,067.68 : 204,064.62 = 86,072.68 : x
  2. Step 2: Convert to fraction form
    136,067.68/204,064.62 = 86,072.68/x
  3. Step 3: Cross multiply
    136,067.68x = 204,064.62 × 86,072.68
  4. Step 4: Simplify right side
    136,067.68x = 17,564,388,736.58
  5. Step 5: Solve for x
    x = 17,564,388,736.58/136,067.68
  6. Step 6: Final answer
    x = 129,085.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.