Finding the Fourth Proportional to 128,601.08, 177,467.57 and 71,240.23
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Solution
The fourth proportional to 128,601.08, 177,467.57 and 71,240.23 is: 98,310.45
Step by Step Solution
- Step 1: Write the proportion equation
128,601.08 : 177,467.57 = 71,240.23 : x - Step 2: Convert to fraction form
128,601.08/177,467.57 = 71,240.23/x - Step 3: Cross multiply
128,601.08x = 177,467.57 × 71,240.23 - Step 4: Simplify right side
128,601.08x = 12,642,830,039.60 - Step 5: Solve for x
x = 12,642,830,039.60/128,601.08 - Step 6: Final answer
x = 98,310.45
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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.