Finding the Fourth Proportional to 129,725.63, 179,021.08 and 73,136.60
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Solution
The fourth proportional to 129,725.63, 179,021.08 and 73,136.60 is: 100,928.34
Step by Step Solution
- Step 1: Write the proportion equation
129,725.63 : 179,021.08 = 73,136.60 : x - Step 2: Convert to fraction form
129,725.63/179,021.08 = 73,136.60/x - Step 3: Cross multiply
129,725.63x = 179,021.08 × 73,136.60 - Step 4: Simplify right side
129,725.63x = 13,092,993,384.24 - Step 5: Solve for x
x = 13,092,993,384.24/129,725.63 - Step 6: Final answer
x = 100,928.34
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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.