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Finding the Fourth Proportional to 69,103.08, 103,656.78 and 19,183.68

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Solution

The fourth proportional to 69,103.08, 103,656.78 and 19,183.68 is: 28,776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,103.08 : 103,656.78 = 19,183.68 : x
  2. Step 2: Convert to fraction form
    69,103.08/103,656.78 = 19,183.68/x
  3. Step 3: Cross multiply
    69,103.08x = 103,656.78 × 19,183.68
  4. Step 4: Simplify right side
    69,103.08x = 1,988,518,497.35
  5. Step 5: Solve for x
    x = 1,988,518,497.35/69,103.08
  6. Step 6: Final answer
    x = 28,776.12

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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.