Finding the Fourth Proportional to 128,540.52, 177,387.77 and 74,062.62
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Solution
The fourth proportional to 128,540.52, 177,387.77 and 74,062.62 is: 102,207.48
Step by Step Solution
- Step 1: Write the proportion equation
128,540.52 : 177,387.77 = 74,062.62 : x - Step 2: Convert to fraction form
128,540.52/177,387.77 = 74,062.62/x - Step 3: Cross multiply
128,540.52x = 177,387.77 × 74,062.62 - Step 4: Simplify right side
128,540.52x = 13,137,803,187.31 - Step 5: Solve for x
x = 13,137,803,187.31/128,540.52 - Step 6: Final answer
x = 102,207.48
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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.