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Finding the Fourth Proportional to 69,768.29, 104,652.43 and 20,520.29

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Solution

The fourth proportional to 69,768.29, 104,652.43 and 20,520.29 is: 30,780.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,768.29 : 104,652.43 = 20,520.29 : x
  2. Step 2: Convert to fraction form
    69,768.29/104,652.43 = 20,520.29/x
  3. Step 3: Cross multiply
    69,768.29x = 104,652.43 × 20,520.29
  4. Step 4: Simplify right side
    69,768.29x = 2,147,498,423.14
  5. Step 5: Solve for x
    x = 2,147,498,423.14/69,768.29
  6. Step 6: Final answer
    x = 30,780.44

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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.