Finding the Fourth Proportional to 121,213.81, 181,759.84 and 70,629.17
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Solution
The fourth proportional to 121,213.81, 181,759.84 and 70,629.17 is: 105,908.28
Step by Step Solution
- Step 1: Write the proportion equation
121,213.81 : 181,759.84 = 70,629.17 : x - Step 2: Convert to fraction form
121,213.81/181,759.84 = 70,629.17/x - Step 3: Cross multiply
121,213.81x = 181,759.84 × 70,629.17 - Step 4: Simplify right side
121,213.81x = 12,837,546,638.53 - Step 5: Solve for x
x = 12,837,546,638.53/121,213.81 - Step 6: Final answer
x = 105,908.28
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.