Finding the Fourth Proportional to 129,193.99, 178,297.20 and 71,843.63
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Solution
The fourth proportional to 129,193.99, 178,297.20 and 71,843.63 is: 99,149.48
Step by Step Solution
- Step 1: Write the proportion equation
129,193.99 : 178,297.20 = 71,843.63 : x - Step 2: Convert to fraction form
129,193.99/178,297.20 = 71,843.63/x - Step 3: Cross multiply
129,193.99x = 178,297.20 × 71,843.63 - Step 4: Simplify right side
129,193.99x = 12,809,517,175.35 - Step 5: Solve for x
x = 12,809,517,175.35/129,193.99 - Step 6: Final answer
x = 99,149.48
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.