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Finding the Fourth Proportional to 68,715.66, 103,076.60 and 18,794.64

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Solution

The fourth proportional to 68,715.66, 103,076.60 and 18,794.64 is: 28,192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.66 : 103,076.60 = 18,794.64 : x
  2. Step 2: Convert to fraction form
    68,715.66/103,076.60 = 18,794.64/x
  3. Step 3: Cross multiply
    68,715.66x = 103,076.60 × 18,794.64
  4. Step 4: Simplify right side
    68,715.66x = 1,937,287,495.45
  5. Step 5: Solve for x
    x = 1,937,287,495.45/68,715.66
  6. Step 6: Final answer
    x = 28,192.81

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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.