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Finding the Fourth Proportional to 68,857.45, 103,274.30 and 18,256.83

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Solution

The fourth proportional to 68,857.45, 103,274.30 and 18,256.83 is: 27,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,857.45 : 103,274.30 = 18,256.83 : x
  2. Step 2: Convert to fraction form
    68,857.45/103,274.30 = 18,256.83/x
  3. Step 3: Cross multiply
    68,857.45x = 103,274.30 × 18,256.83
  4. Step 4: Simplify right side
    68,857.45x = 1,885,461,771.39
  5. Step 5: Solve for x
    x = 1,885,461,771.39/68,857.45
  6. Step 6: Final answer
    x = 27,382.10

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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.