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Finding the Fourth Proportional to 69,063.70, 103,585.30 and 19,138.59

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Solution

The fourth proportional to 69,063.70, 103,585.30 and 19,138.59 is: 28,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,063.70 : 103,585.30 = 19,138.59 : x
  2. Step 2: Convert to fraction form
    69,063.70/103,585.30 = 19,138.59/x
  3. Step 3: Cross multiply
    69,063.70x = 103,585.30 × 19,138.59
  4. Step 4: Simplify right side
    69,063.70x = 1,982,476,635.99
  5. Step 5: Solve for x
    x = 1,982,476,635.99/69,063.70
  6. Step 6: Final answer
    x = 28,705.05

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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.