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Finding the Fourth Proportional to 45,448.80, 68,186.64 and 20,496.48

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Solution

The fourth proportional to 45,448.80, 68,186.64 and 20,496.48 is: 30,750.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,448.80 : 68,186.64 = 20,496.48 : x
  2. Step 2: Convert to fraction form
    45,448.80/68,186.64 = 20,496.48/x
  3. Step 3: Cross multiply
    45,448.80x = 68,186.64 × 20,496.48
  4. Step 4: Simplify right side
    45,448.80x = 1,397,586,103.03
  5. Step 5: Solve for x
    x = 1,397,586,103.03/45,448.80
  6. Step 6: Final answer
    x = 30,750.78

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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.