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Finding the Fourth Proportional to 69,766.84, 104,650.28 and 20,518.84

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Solution

The fourth proportional to 69,766.84, 104,650.28 and 20,518.84 is: 30,778.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,766.84 : 104,650.28 = 20,518.84 : x
  2. Step 2: Convert to fraction form
    69,766.84/104,650.28 = 20,518.84/x
  3. Step 3: Cross multiply
    69,766.84x = 104,650.28 × 20,518.84
  4. Step 4: Simplify right side
    69,766.84x = 2,147,302,351.28
  5. Step 5: Solve for x
    x = 2,147,302,351.28/69,766.84
  6. Step 6: Final answer
    x = 30,778.27

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1.5x scale

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.