Finding the Fourth Proportional to 129,920.68, 179,287.14 and 72,558.44
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Solution
The fourth proportional to 129,920.68, 179,287.14 and 72,558.44 is: 100,128.75
Step by Step Solution
- Step 1: Write the proportion equation
129,920.68 : 179,287.14 = 72,558.44 : x - Step 2: Convert to fraction form
129,920.68/179,287.14 = 72,558.44/x - Step 3: Cross multiply
129,920.68x = 179,287.14 × 72,558.44 - Step 4: Simplify right side
129,920.68x = 13,008,795,190.46 - Step 5: Solve for x
x = 13,008,795,190.46/129,920.68 - Step 6: Final answer
x = 100,128.75
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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.