Finding the Fourth Proportional to 76,540.75, 114,817.74 and 21,136.75
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Solution
The fourth proportional to 76,540.75, 114,817.74 and 21,136.75 is: 31,706.95
Step by Step Solution
- Step 1: Write the proportion equation
76,540.75 : 114,817.74 = 21,136.75 : x - Step 2: Convert to fraction form
76,540.75/114,817.74 = 21,136.75/x - Step 3: Cross multiply
76,540.75x = 114,817.74 × 21,136.75 - Step 4: Simplify right side
76,540.75x = 2,426,873,865.95 - Step 5: Solve for x
x = 2,426,873,865.95/76,540.75 - Step 6: Final answer
x = 31,706.95
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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.