Finding the Fourth Proportional to 189,888.68, 261,837.71 and 121,879.96
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Solution
The fourth proportional to 189,888.68, 261,837.71 and 121,879.96 is: 168,060.41
Step by Step Solution
- Step 1: Write the proportion equation
189,888.68 : 261,837.71 = 121,879.96 : x - Step 2: Convert to fraction form
189,888.68/261,837.71 = 121,879.96/x - Step 3: Cross multiply
189,888.68x = 261,837.71 × 121,879.96 - Step 4: Simplify right side
189,888.68x = 31,912,769,621.29 - Step 5: Solve for x
x = 31,912,769,621.29/189,888.68 - Step 6: Final answer
x = 168,060.41
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1.5x scale
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.