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Finding the Fourth Proportional to 68,805.97, 103,208.02 and 18,886

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Solution

The fourth proportional to 68,805.97, 103,208.02 and 18,886 is: 28,328.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,805.97 : 103,208.02 = 18,886 : x
  2. Step 2: Convert to fraction form
    68,805.97/103,208.02 = 18,886/x
  3. Step 3: Cross multiply
    68,805.97x = 103,208.02 × 18,886
  4. Step 4: Simplify right side
    68,805.97x = 1,949,186,665.72
  5. Step 5: Solve for x
    x = 1,949,186,665.72/68,805.97
  6. Step 6: Final answer
    x = 28,328.74

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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.