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Finding the Fourth Proportional to 68,920.29, 103,380.90 and 19,003.08

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Solution

The fourth proportional to 68,920.29, 103,380.90 and 19,003.08 is: 28,504.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,920.29 : 103,380.90 = 19,003.08 : x
  2. Step 2: Convert to fraction form
    68,920.29/103,380.90 = 19,003.08/x
  3. Step 3: Cross multiply
    68,920.29x = 103,380.90 × 19,003.08
  4. Step 4: Simplify right side
    68,920.29x = 1,964,555,513.17
  5. Step 5: Solve for x
    x = 1,964,555,513.17/68,920.29
  6. Step 6: Final answer
    x = 28,504.75

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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.