Finding the Fourth Proportional to 189,715.68, 261,929.67 and 121,761.93
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Solution
The fourth proportional to 189,715.68, 261,929.67 and 121,761.93 is: 168,109.78
Step by Step Solution
- Step 1: Write the proportion equation
189,715.68 : 261,929.67 = 121,761.93 : x - Step 2: Convert to fraction form
189,715.68/261,929.67 = 121,761.93/x - Step 3: Cross multiply
189,715.68x = 261,929.67 × 121,761.93 - Step 4: Simplify right side
189,715.68x = 31,893,062,143.46 - Step 5: Solve for x
x = 31,893,062,143.46/189,715.68 - Step 6: Final answer
x = 168,109.78
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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.