Finding the Fourth Proportional to 128,343.36, 177,042.74 and 74,622.44
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Solution
The fourth proportional to 128,343.36, 177,042.74 and 74,622.44 is: 102,937.63
Step by Step Solution
- Step 1: Write the proportion equation
128,343.36 : 177,042.74 = 74,622.44 : x - Step 2: Convert to fraction form
128,343.36/177,042.74 = 74,622.44/x - Step 3: Cross multiply
128,343.36x = 177,042.74 × 74,622.44 - Step 4: Simplify right side
128,343.36x = 13,211,361,592.41 - Step 5: Solve for x
x = 13,211,361,592.41/128,343.36 - Step 6: Final answer
x = 102,937.63
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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.