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Finding the Fourth Proportional to 68,243.46, 102,329.55 and 21,483.78

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Solution

The fourth proportional to 68,243.46, 102,329.55 and 21,483.78 is: 32,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,243.46 : 102,329.55 = 21,483.78 : x
  2. Step 2: Convert to fraction form
    68,243.46/102,329.55 = 21,483.78/x
  3. Step 3: Cross multiply
    68,243.46x = 102,329.55 × 21,483.78
  4. Step 4: Simplify right side
    68,243.46x = 2,198,425,539.70
  5. Step 5: Solve for x
    x = 2,198,425,539.70/68,243.46
  6. Step 6: Final answer
    x = 32,214.45

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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.