Finding the Fourth Proportional to 128,505.44, 177,350.76 and 74,059.52
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Solution
The fourth proportional to 128,505.44, 177,350.76 and 74,059.52 is: 102,209.78
Step by Step Solution
- Step 1: Write the proportion equation
128,505.44 : 177,350.76 = 74,059.52 : x - Step 2: Convert to fraction form
128,505.44/177,350.76 = 74,059.52/x - Step 3: Cross multiply
128,505.44x = 177,350.76 × 74,059.52 - Step 4: Simplify right side
128,505.44x = 13,134,512,157.24 - Step 5: Solve for x
x = 13,134,512,157.24/128,505.44 - Step 6: Final answer
x = 102,209.78
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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.