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Finding the Fourth Proportional to 40,122, 60,183 and 12,420

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Solution

The fourth proportional to 40,122, 60,183 and 12,420 is: 18,630

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,122 : 60,183 = 12,420 : x
  2. Step 2: Convert to fraction form
    40,122/60,183 = 12,420/x
  3. Step 3: Cross multiply
    40,122x = 60,183 × 12,420
  4. Step 4: Simplify right side
    40,122x = 747,472,860
  5. Step 5: Solve for x
    x = 747,472,860/40,122
  6. Step 6: Final answer
    x = 18,630

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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.