Finding the Fourth Proportional to 128,649.66, 177,623.28 and 80,325.24
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Solution
The fourth proportional to 128,649.66, 177,623.28 and 80,325.24 is: 110,902.99
Step by Step Solution
- Step 1: Write the proportion equation
128,649.66 : 177,623.28 = 80,325.24 : x - Step 2: Convert to fraction form
128,649.66/177,623.28 = 80,325.24/x - Step 3: Cross multiply
128,649.66x = 177,623.28 × 80,325.24 - Step 4: Simplify right side
128,649.66x = 14,267,632,595.59 - Step 5: Solve for x
x = 14,267,632,595.59/128,649.66 - Step 6: Final answer
x = 110,902.99
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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.