Finding the Fourth Proportional to 81,928.92, 122,768.19 and 55,175.99
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Solution
The fourth proportional to 81,928.92, 122,768.19 and 55,175.99 is: 82,679.67
Step by Step Solution
- Step 1: Write the proportion equation
81,928.92 : 122,768.19 = 55,175.99 : x - Step 2: Convert to fraction form
81,928.92/122,768.19 = 55,175.99/x - Step 3: Cross multiply
81,928.92x = 122,768.19 × 55,175.99 - Step 4: Simplify right side
81,928.92x = 6,773,855,809.92 - Step 5: Solve for x
x = 6,773,855,809.92/81,928.92 - Step 6: Final answer
x = 82,679.67
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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.