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Finding the Fourth Proportional to 136,791.78, 188,851.14 and 104,271.09

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Solution

The fourth proportional to 136,791.78, 188,851.14 and 104,271.09 is: 143,953.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,791.78 : 188,851.14 = 104,271.09 : x
  2. Step 2: Convert to fraction form
    136,791.78/188,851.14 = 104,271.09/x
  3. Step 3: Cross multiply
    136,791.78x = 188,851.14 × 104,271.09
  4. Step 4: Simplify right side
    136,791.78x = 19,691,714,215.54
  5. Step 5: Solve for x
    x = 19,691,714,215.54/136,791.78
  6. Step 6: Final answer
    x = 143,953.93

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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.