Finding the Fourth Proportional to 128,407.40, 177,207.43 and 71,045.80
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Solution
The fourth proportional to 128,407.40, 177,207.43 and 71,045.80 is: 98,046.09
Step by Step Solution
- Step 1: Write the proportion equation
128,407.40 : 177,207.43 = 71,045.80 : x - Step 2: Convert to fraction form
128,407.40/177,207.43 = 71,045.80/x - Step 3: Cross multiply
128,407.40x = 177,207.43 × 71,045.80 - Step 4: Simplify right side
128,407.40x = 12,589,843,193.40 - Step 5: Solve for x
x = 12,589,843,193.40/128,407.40 - Step 6: Final answer
x = 98,046.09
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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.