Finding the Fourth Proportional to 220,089.31, 303,724.51 and 129,449.09
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Solution
The fourth proportional to 220,089.31, 303,724.51 and 129,449.09 is: 178,640.49
Step by Step Solution
- Step 1: Write the proportion equation
220,089.31 : 303,724.51 = 129,449.09 : x - Step 2: Convert to fraction form
220,089.31/303,724.51 = 129,449.09/x - Step 3: Cross multiply
220,089.31x = 303,724.51 × 129,449.09 - Step 4: Simplify right side
220,089.31x = 39,316,861,865.88 - Step 5: Solve for x
x = 39,316,861,865.88/220,089.31 - Step 6: Final answer
x = 178,640.49
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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.