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Finding the Fourth Proportional to 45,381.52, 68,048.88 and 20,400.22

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Solution

The fourth proportional to 45,381.52, 68,048.88 and 20,400.22 is: 30,589.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,381.52 : 68,048.88 = 20,400.22 : x
  2. Step 2: Convert to fraction form
    45,381.52/68,048.88 = 20,400.22/x
  3. Step 3: Cross multiply
    45,381.52x = 68,048.88 × 20,400.22
  4. Step 4: Simplify right side
    45,381.52x = 1,388,212,122.75
  5. Step 5: Solve for x
    x = 1,388,212,122.75/45,381.52
  6. Step 6: Final answer
    x = 30,589.81

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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.