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Finding the Fourth Proportional to 203,806.53, 305,611.04 and 85,446.09

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Solution

The fourth proportional to 203,806.53, 305,611.04 and 85,446.09 is: 128,127.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,806.53 : 305,611.04 = 85,446.09 : x
  2. Step 2: Convert to fraction form
    203,806.53/305,611.04 = 85,446.09/x
  3. Step 3: Cross multiply
    203,806.53x = 305,611.04 × 85,446.09
  4. Step 4: Simplify right side
    203,806.53x = 26,113,268,642.45
  5. Step 5: Solve for x
    x = 26,113,268,642.45/203,806.53
  6. Step 6: Final answer
    x = 128,127.73

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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.