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Finding the Fourth Proportional to 135,381.88, 203,103.97 and 45,436.53

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Solution

The fourth proportional to 135,381.88, 203,103.97 and 45,436.53 is: 68,165.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,381.88 : 203,103.97 = 45,436.53 : x
  2. Step 2: Convert to fraction form
    135,381.88/203,103.97 = 45,436.53/x
  3. Step 3: Cross multiply
    135,381.88x = 203,103.97 × 45,436.53
  4. Step 4: Simplify right side
    135,381.88x = 9,228,339,626.02
  5. Step 5: Solve for x
    x = 9,228,339,626.02/135,381.88
  6. Step 6: Final answer
    x = 68,165.25

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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.