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Finding the Fourth Proportional to 68,683.43, 103,039.94 and 21,297.57

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Solution

The fourth proportional to 68,683.43, 103,039.94 and 21,297.57 is: 31,950.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,683.43 : 103,039.94 = 21,297.57 : x
  2. Step 2: Convert to fraction form
    68,683.43/103,039.94 = 21,297.57/x
  3. Step 3: Cross multiply
    68,683.43x = 103,039.94 × 21,297.57
  4. Step 4: Simplify right side
    68,683.43x = 2,194,499,881.99
  5. Step 5: Solve for x
    x = 2,194,499,881.99/68,683.43
  6. Step 6: Final answer
    x = 31,950.94

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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.