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Finding the Fourth Proportional to 68,979.50, 103,469.26 and 19,731.50

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Solution

The fourth proportional to 68,979.50, 103,469.26 and 19,731.50 is: 29,597.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,979.50 : 103,469.26 = 19,731.50 : x
  2. Step 2: Convert to fraction form
    68,979.50/103,469.26 = 19,731.50/x
  3. Step 3: Cross multiply
    68,979.50x = 103,469.26 × 19,731.50
  4. Step 4: Simplify right side
    68,979.50x = 2,041,603,703.69
  5. Step 5: Solve for x
    x = 2,041,603,703.69/68,979.50
  6. Step 6: Final answer
    x = 29,597.25

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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.