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Finding the Fourth Proportional to 69,435, 104,170.26 and 20,187

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Solution

The fourth proportional to 69,435, 104,170.26 and 20,187 is: 30,285.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,435 : 104,170.26 = 20,187 : x
  2. Step 2: Convert to fraction form
    69,435/104,170.26 = 20,187/x
  3. Step 3: Cross multiply
    69,435x = 104,170.26 × 20,187
  4. Step 4: Simplify right side
    69,435x = 2,102,885,038.62
  5. Step 5: Solve for x
    x = 2,102,885,038.62/69,435
  6. Step 6: Final answer
    x = 30,285.66

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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.