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Finding the Fourth Proportional to 129,485.88, 194,229 and 74,043

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Solution

The fourth proportional to 129,485.88, 194,229 and 74,043 is: 111,064.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,485.88 : 194,229 = 74,043 : x
  2. Step 2: Convert to fraction form
    129,485.88/194,229 = 74,043/x
  3. Step 3: Cross multiply
    129,485.88x = 194,229 × 74,043
  4. Step 4: Simplify right side
    129,485.88x = 14,381,297,847
  5. Step 5: Solve for x
    x = 14,381,297,847/129,485.88
  6. Step 6: Final answer
    x = 111,064.60

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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.