Finding the Fourth Proportional to 76,911.41, 115,375.17 and 20,751.99
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Solution
The fourth proportional to 76,911.41, 115,375.17 and 20,751.99 is: 31,130.16
Step by Step Solution
- Step 1: Write the proportion equation
76,911.41 : 115,375.17 = 20,751.99 : x - Step 2: Convert to fraction form
76,911.41/115,375.17 = 20,751.99/x - Step 3: Cross multiply
76,911.41x = 115,375.17 × 20,751.99 - Step 4: Simplify right side
76,911.41x = 2,394,264,374.09 - Step 5: Solve for x
x = 2,394,264,374.09/76,911.41 - Step 6: Final answer
x = 31,130.16
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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.