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Finding the Fourth Proportional to 135,503.33, 203,379.93 and 68,991.39

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Solution

The fourth proportional to 135,503.33, 203,379.93 and 68,991.39 is: 103,550.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,503.33 : 203,379.93 = 68,991.39 : x
  2. Step 2: Convert to fraction form
    135,503.33/203,379.93 = 68,991.39/x
  3. Step 3: Cross multiply
    135,503.33x = 203,379.93 × 68,991.39
  4. Step 4: Simplify right side
    135,503.33x = 14,031,464,068.80
  5. Step 5: Solve for x
    x = 14,031,464,068.80/135,503.33
  6. Step 6: Final answer
    x = 103,550.70

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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.