Finding the Fourth Proportional to 128,524.41, 177,350.90 and 74,816.55
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Solution
The fourth proportional to 128,524.41, 177,350.90 and 74,816.55 is: 103,239.39
Step by Step Solution
- Step 1: Write the proportion equation
128,524.41 : 177,350.90 = 74,816.55 : x - Step 2: Convert to fraction form
128,524.41/177,350.90 = 74,816.55/x - Step 3: Cross multiply
128,524.41x = 177,350.90 × 74,816.55 - Step 4: Simplify right side
128,524.41x = 13,268,782,103.31 - Step 5: Solve for x
x = 13,268,782,103.31/128,524.41 - Step 6: Final answer
x = 103,239.39
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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.