Finding the Fourth Proportional to 128,274.09, 177,009.74 and 73,817.44
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Solution
The fourth proportional to 128,274.09, 177,009.74 and 73,817.44 is: 101,863.18
Step by Step Solution
- Step 1: Write the proportion equation
128,274.09 : 177,009.74 = 73,817.44 : x - Step 2: Convert to fraction form
128,274.09/177,009.74 = 73,817.44/x - Step 3: Cross multiply
128,274.09x = 177,009.74 × 73,817.44 - Step 4: Simplify right side
128,274.09x = 13,066,406,737.97 - Step 5: Solve for x
x = 13,066,406,737.97/128,274.09 - Step 6: Final answer
x = 101,863.18
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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.