Finding the Fourth Proportional to 128,841.65, 193,326.94 and 57,815.09
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Solution
The fourth proportional to 128,841.65, 193,326.94 and 57,815.09 is: 86,751.55
Step by Step Solution
- Step 1: Write the proportion equation
128,841.65 : 193,326.94 = 57,815.09 : x - Step 2: Convert to fraction form
128,841.65/193,326.94 = 57,815.09/x - Step 3: Cross multiply
128,841.65x = 193,326.94 × 57,815.09 - Step 4: Simplify right side
128,841.65x = 11,177,213,324.35 - Step 5: Solve for x
x = 11,177,213,324.35/128,841.65 - Step 6: Final answer
x = 86,751.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.