Finding the Fourth Proportional to 128,741.13, 177,673.69 and 72,163.44
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Solution
The fourth proportional to 128,741.13, 177,673.69 and 72,163.44 is: 99,591.67
Step by Step Solution
- Step 1: Write the proportion equation
128,741.13 : 177,673.69 = 72,163.44 : x - Step 2: Convert to fraction form
128,741.13/177,673.69 = 72,163.44/x - Step 3: Cross multiply
128,741.13x = 177,673.69 × 72,163.44 - Step 4: Simplify right side
128,741.13x = 12,821,544,667.89 - Step 5: Solve for x
x = 12,821,544,667.89/128,741.13 - Step 6: Final answer
x = 99,591.67
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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.