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Finding the Fourth Proportional to 124,686, 172,067.64 and 68,097.39

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Solution

The fourth proportional to 124,686, 172,067.64 and 68,097.39 is: 93,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,686 : 172,067.64 = 68,097.39 : x
  2. Step 2: Convert to fraction form
    124,686/172,067.64 = 68,097.39/x
  3. Step 3: Cross multiply
    124,686x = 172,067.64 × 68,097.39
  4. Step 4: Simplify right side
    124,686x = 11,717,357,187.46
  5. Step 5: Solve for x
    x = 11,717,357,187.46/124,686
  6. Step 6: Final answer
    x = 93,974.92

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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.