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Finding the Fourth Proportional to 68,809, 103,230.84 and 19,561

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Solution

The fourth proportional to 68,809, 103,230.84 and 19,561 is: 29,346.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809 : 103,230.84 = 19,561 : x
  2. Step 2: Convert to fraction form
    68,809/103,230.84 = 19,561/x
  3. Step 3: Cross multiply
    68,809x = 103,230.84 × 19,561
  4. Step 4: Simplify right side
    68,809x = 2,019,298,461.24
  5. Step 5: Solve for x
    x = 2,019,298,461.24/68,809
  6. Step 6: Final answer
    x = 29,346.43

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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.