Finding the Fourth Proportional to 208,742.09, 288,213.86 and 128,277.50
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Solution
The fourth proportional to 208,742.09, 288,213.86 and 128,277.50 is: 177,114.99
Step by Step Solution
- Step 1: Write the proportion equation
208,742.09 : 288,213.86 = 128,277.50 : x - Step 2: Convert to fraction form
208,742.09/288,213.86 = 128,277.50/x - Step 3: Cross multiply
208,742.09x = 288,213.86 × 128,277.50 - Step 4: Simplify right side
208,742.09x = 36,971,352,305.77 - Step 5: Solve for x
x = 36,971,352,305.77/208,742.09 - Step 6: Final answer
x = 177,114.99
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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.