Finding the Fourth Proportional to 128,657.08, 177,556.62 and 80,951.32
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Solution
The fourth proportional to 128,657.08, 177,556.62 and 80,951.32 is: 111,719.02
Step by Step Solution
- Step 1: Write the proportion equation
128,657.08 : 177,556.62 = 80,951.32 : x - Step 2: Convert to fraction form
128,657.08/177,556.62 = 80,951.32/x - Step 3: Cross multiply
128,657.08x = 177,556.62 × 80,951.32 - Step 4: Simplify right side
128,657.08x = 14,373,442,763.74 - Step 5: Solve for x
x = 14,373,442,763.74/128,657.08 - Step 6: Final answer
x = 111,719.02
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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.