Finding the Fourth Proportional to 128,609.76, 192,914.66 and 53,689.02
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Solution
The fourth proportional to 128,609.76, 192,914.66 and 53,689.02 is: 80,533.54
Step by Step Solution
- Step 1: Write the proportion equation
128,609.76 : 192,914.66 = 53,689.02 : x - Step 2: Convert to fraction form
128,609.76/192,914.66 = 53,689.02/x - Step 3: Cross multiply
128,609.76x = 192,914.66 × 53,689.02 - Step 4: Simplify right side
128,609.76x = 10,357,399,039.03 - Step 5: Solve for x
x = 10,357,399,039.03/128,609.76 - Step 6: Final answer
x = 80,533.54
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.