Finding the Fourth Proportional to 219,876.57, 303,437.12 and 129,231.23
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Solution
The fourth proportional to 219,876.57, 303,437.12 and 129,231.23 is: 178,343.47
Step by Step Solution
- Step 1: Write the proportion equation
219,876.57 : 303,437.12 = 129,231.23 : x - Step 2: Convert to fraction form
219,876.57/303,437.12 = 129,231.23/x - Step 3: Cross multiply
219,876.57x = 303,437.12 × 129,231.23 - Step 4: Simplify right side
219,876.57x = 39,213,550,081.92 - Step 5: Solve for x
x = 39,213,550,081.92/219,876.57 - Step 6: Final answer
x = 178,343.47
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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.