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Finding the Fourth Proportional to 68,677.95, 103,016.57 and 21,929.79

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Solution

The fourth proportional to 68,677.95, 103,016.57 and 21,929.79 is: 32,894.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,677.95 : 103,016.57 = 21,929.79 : x
  2. Step 2: Convert to fraction form
    68,677.95/103,016.57 = 21,929.79/x
  3. Step 3: Cross multiply
    68,677.95x = 103,016.57 × 21,929.79
  4. Step 4: Simplify right side
    68,677.95x = 2,259,131,636.97
  5. Step 5: Solve for x
    x = 2,259,131,636.97/68,677.95
  6. Step 6: Final answer
    x = 32,894.57

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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.