Finding the Fourth Proportional to 208,743.21, 288,215.42 and 128,278.62
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Solution
The fourth proportional to 208,743.21, 288,215.42 and 128,278.62 is: 177,116.54
Step by Step Solution
- Step 1: Write the proportion equation
208,743.21 : 288,215.42 = 128,278.62 : x - Step 2: Convert to fraction form
208,743.21/288,215.42 = 128,278.62/x - Step 3: Cross multiply
208,743.21x = 288,215.42 × 128,278.62 - Step 4: Simplify right side
208,743.21x = 36,971,875,698.93 - Step 5: Solve for x
x = 36,971,875,698.93/208,743.21 - Step 6: Final answer
x = 177,116.54
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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.