Finding the Fourth Proportional to 129,349.35, 178,501.44 and 72,761.13
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Solution
The fourth proportional to 129,349.35, 178,501.44 and 72,761.13 is: 100,409.99
Step by Step Solution
- Step 1: Write the proportion equation
129,349.35 : 178,501.44 = 72,761.13 : x - Step 2: Convert to fraction form
129,349.35/178,501.44 = 72,761.13/x - Step 3: Cross multiply
129,349.35x = 178,501.44 × 72,761.13 - Step 4: Simplify right side
129,349.35x = 12,987,966,481.03 - Step 5: Solve for x
x = 12,987,966,481.03/129,349.35 - Step 6: Final answer
x = 100,409.99
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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.