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Finding the Fourth Proportional to 68,674.59, 102,990.02 and 21,916.53

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Solution

The fourth proportional to 68,674.59, 102,990.02 and 21,916.53 is: 32,867.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,674.59 : 102,990.02 = 21,916.53 : x
  2. Step 2: Convert to fraction form
    68,674.59/102,990.02 = 21,916.53/x
  3. Step 3: Cross multiply
    68,674.59x = 102,990.02 × 21,916.53
  4. Step 4: Simplify right side
    68,674.59x = 2,257,183,753.45
  5. Step 5: Solve for x
    x = 2,257,183,753.45/68,674.59
  6. Step 6: Final answer
    x = 32,867.82

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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.