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Finding the Fourth Proportional to 67,408.62, 100,899.66 and 42,361.98

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Solution

The fourth proportional to 67,408.62, 100,899.66 and 42,361.98 is: 63,408.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,408.62 : 100,899.66 = 42,361.98 : x
  2. Step 2: Convert to fraction form
    67,408.62/100,899.66 = 42,361.98/x
  3. Step 3: Cross multiply
    67,408.62x = 100,899.66 × 42,361.98
  4. Step 4: Simplify right side
    67,408.62x = 4,274,309,378.93
  5. Step 5: Solve for x
    x = 4,274,309,378.93/67,408.62
  6. Step 6: Final answer
    x = 63,408.94

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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.