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Finding the Fourth Proportional to 135,813.70, 203,556.53 and 69,219.55

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Solution

The fourth proportional to 135,813.70, 203,556.53 and 69,219.55 is: 103,745.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,813.70 : 203,556.53 = 69,219.55 : x
  2. Step 2: Convert to fraction form
    135,813.70/203,556.53 = 69,219.55/x
  3. Step 3: Cross multiply
    135,813.70x = 203,556.53 × 69,219.55
  4. Step 4: Simplify right side
    135,813.70x = 14,090,091,060.06
  5. Step 5: Solve for x
    x = 14,090,091,060.06/135,813.70
  6. Step 6: Final answer
    x = 103,745.73

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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.