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Finding the Fourth Proportional to 68,447.88, 102,681.71 and 21,067.04

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Solution

The fourth proportional to 68,447.88, 102,681.71 and 21,067.04 is: 31,603.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,447.88 : 102,681.71 = 21,067.04 : x
  2. Step 2: Convert to fraction form
    68,447.88/102,681.71 = 21,067.04/x
  3. Step 3: Cross multiply
    68,447.88x = 102,681.71 × 21,067.04
  4. Step 4: Simplify right side
    68,447.88x = 2,163,199,073.09
  5. Step 5: Solve for x
    x = 2,163,199,073.09/68,447.88
  6. Step 6: Final answer
    x = 31,603.59

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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.