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Finding the Fourth Proportional to 68,715.84, 103,076.88 and 18,794.84

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Solution

The fourth proportional to 68,715.84, 103,076.88 and 18,794.84 is: 28,193.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.84 : 103,076.88 = 18,794.84 : x
  2. Step 2: Convert to fraction form
    68,715.84/103,076.88 = 18,794.84/x
  3. Step 3: Cross multiply
    68,715.84x = 103,076.88 × 18,794.84
  4. Step 4: Simplify right side
    68,715.84x = 1,937,312,951.91
  5. Step 5: Solve for x
    x = 1,937,312,951.91/68,715.84
  6. Step 6: Final answer
    x = 28,193.11

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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.