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Finding the Fourth Proportional to 69,048.99, 103,575.71 and 19,129.57

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Solution

The fourth proportional to 69,048.99, 103,575.71 and 19,129.57 is: 28,694.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,048.99 : 103,575.71 = 19,129.57 : x
  2. Step 2: Convert to fraction form
    69,048.99/103,575.71 = 19,129.57/x
  3. Step 3: Cross multiply
    69,048.99x = 103,575.71 × 19,129.57
  4. Step 4: Simplify right side
    69,048.99x = 1,981,358,583.63
  5. Step 5: Solve for x
    x = 1,981,358,583.63/69,048.99
  6. Step 6: Final answer
    x = 28,694.97

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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.