Finding the Fourth Proportional to 128,423.26, 177,231.99 and 71,838.46
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Solution
The fourth proportional to 128,423.26, 177,231.99 and 71,838.46 is: 99,141.49
Step by Step Solution
- Step 1: Write the proportion equation
128,423.26 : 177,231.99 = 71,838.46 : x - Step 2: Convert to fraction form
128,423.26/177,231.99 = 71,838.46/x - Step 3: Cross multiply
128,423.26x = 177,231.99 × 71,838.46 - Step 4: Simplify right side
128,423.26x = 12,732,073,224.34 - Step 5: Solve for x
x = 12,732,073,224.34/128,423.26 - Step 6: Final answer
x = 99,141.49
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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.