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Finding the Fourth Proportional to 135,503.34, 203,379.78 and 68,991

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Solution

The fourth proportional to 135,503.34, 203,379.78 and 68,991 is: 103,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,503.34 : 203,379.78 = 68,991 : x
  2. Step 2: Convert to fraction form
    135,503.34/203,379.78 = 68,991/x
  3. Step 3: Cross multiply
    135,503.34x = 203,379.78 × 68,991
  4. Step 4: Simplify right side
    135,503.34x = 14,031,374,401.98
  5. Step 5: Solve for x
    x = 14,031,374,401.98/135,503.34
  6. Step 6: Final answer
    x = 103,550.03

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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.