Finding the Fourth Proportional to 133,142.68, 183,738.36 and 72,715.09
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Solution
The fourth proportional to 133,142.68, 183,738.36 and 72,715.09 is: 100,347.62
Step by Step Solution
- Step 1: Write the proportion equation
133,142.68 : 183,738.36 = 72,715.09 : x - Step 2: Convert to fraction form
133,142.68/183,738.36 = 72,715.09/x - Step 3: Cross multiply
133,142.68x = 183,738.36 × 72,715.09 - Step 4: Simplify right side
133,142.68x = 13,360,551,383.85 - Step 5: Solve for x
x = 13,360,551,383.85/133,142.68 - Step 6: Final answer
x = 100,347.62
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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.