Finding the Fourth Proportional to 76,857.80, 115,286.70 and 61,305.80
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Solution
The fourth proportional to 76,857.80, 115,286.70 and 61,305.80 is: 91,958.70
Step by Step Solution
- Step 1: Write the proportion equation
76,857.80 : 115,286.70 = 61,305.80 : x - Step 2: Convert to fraction form
76,857.80/115,286.70 = 61,305.80/x - Step 3: Cross multiply
76,857.80x = 115,286.70 × 61,305.80 - Step 4: Simplify right side
76,857.80x = 7,067,743,372.86 - Step 5: Solve for x
x = 7,067,743,372.86/76,857.80 - Step 6: Final answer
x = 91,958.70
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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.