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Finding the Fourth Proportional to 69,110.91, 103,653.81 and 19,178.46

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Solution

The fourth proportional to 69,110.91, 103,653.81 and 19,178.46 is: 28,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,110.91 : 103,653.81 = 19,178.46 : x
  2. Step 2: Convert to fraction form
    69,110.91/103,653.81 = 19,178.46/x
  3. Step 3: Cross multiply
    69,110.91x = 103,653.81 × 19,178.46
  4. Step 4: Simplify right side
    69,110.91x = 1,987,920,448.93
  5. Step 5: Solve for x
    x = 1,987,920,448.93/69,110.91
  6. Step 6: Final answer
    x = 28,764.21

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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.