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Finding the Fourth Proportional to 69,122.76, 103,686.03 and 19,203

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Solution

The fourth proportional to 69,122.76, 103,686.03 and 19,203 is: 28,805.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,122.76 : 103,686.03 = 19,203 : x
  2. Step 2: Convert to fraction form
    69,122.76/103,686.03 = 19,203/x
  3. Step 3: Cross multiply
    69,122.76x = 103,686.03 × 19,203
  4. Step 4: Simplify right side
    69,122.76x = 1,991,082,834.09
  5. Step 5: Solve for x
    x = 1,991,082,834.09/69,122.76
  6. Step 6: Final answer
    x = 28,805.03

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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.