Finding the Fourth Proportional to 128,341.70, 177,102.56 and 74,622.91
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Solution
The fourth proportional to 128,341.70, 177,102.56 and 74,622.91 is: 102,974.38
Step by Step Solution
- Step 1: Write the proportion equation
128,341.70 : 177,102.56 = 74,622.91 : x - Step 2: Convert to fraction form
128,341.70/177,102.56 = 74,622.91/x - Step 3: Cross multiply
128,341.70x = 177,102.56 × 74,622.91 - Step 4: Simplify right side
128,341.70x = 13,215,907,137.02 - Step 5: Solve for x
x = 13,215,907,137.02/128,341.70 - Step 6: Final answer
x = 102,974.38
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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.