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Finding the Fourth Proportional to 69,438.08, 104,160 and 20,190.08

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Solution

The fourth proportional to 69,438.08, 104,160 and 20,190.08 is: 30,285.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,438.08 : 104,160 = 20,190.08 : x
  2. Step 2: Convert to fraction form
    69,438.08/104,160 = 20,190.08/x
  3. Step 3: Cross multiply
    69,438.08x = 104,160 × 20,190.08
  4. Step 4: Simplify right side
    69,438.08x = 2,102,998,732.80
  5. Step 5: Solve for x
    x = 2,102,998,732.80/69,438.08
  6. Step 6: Final answer
    x = 30,285.96

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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.