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Finding the Fourth Proportional to 68,045.80, 102,067.98 and 21,299.08

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Solution

The fourth proportional to 68,045.80, 102,067.98 and 21,299.08 is: 31,948.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,045.80 : 102,067.98 = 21,299.08 : x
  2. Step 2: Convert to fraction form
    68,045.80/102,067.98 = 21,299.08/x
  3. Step 3: Cross multiply
    68,045.80x = 102,067.98 × 21,299.08
  4. Step 4: Simplify right side
    68,045.80x = 2,173,954,071.46
  5. Step 5: Solve for x
    x = 2,173,954,071.46/68,045.80
  6. Step 6: Final answer
    x = 31,948.39

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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.