Finding the Fourth Proportional to 128,446.65, 177,294.29 and 74,755.53
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Solution
The fourth proportional to 128,446.65, 177,294.29 and 74,755.53 is: 103,184.69
Step by Step Solution
- Step 1: Write the proportion equation
128,446.65 : 177,294.29 = 74,755.53 : x - Step 2: Convert to fraction form
128,446.65/177,294.29 = 74,755.53/x - Step 3: Cross multiply
128,446.65x = 177,294.29 × 74,755.53 - Step 4: Simplify right side
128,446.65x = 13,253,728,241.15 - Step 5: Solve for x
x = 13,253,728,241.15/128,446.65 - Step 6: Final answer
x = 103,184.69
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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.