Finding the Fourth Proportional to 225,978.71, 311,837.18 and 129,193.02
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Solution
The fourth proportional to 225,978.71, 311,837.18 and 129,193.02 is: 178,278.69
Step by Step Solution
- Step 1: Write the proportion equation
225,978.71 : 311,837.18 = 129,193.02 : x - Step 2: Convert to fraction form
225,978.71/311,837.18 = 129,193.02/x - Step 3: Cross multiply
225,978.71x = 311,837.18 × 129,193.02 - Step 4: Simplify right side
225,978.71x = 40,287,186,386.52 - Step 5: Solve for x
x = 40,287,186,386.52/225,978.71 - Step 6: Final answer
x = 178,278.69
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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.