Finding the Fourth Proportional to 128,548.28, 177,735.12 and 112,586.96
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Solution
The fourth proportional to 128,548.28, 177,735.12 and 112,586.96 is: 155,666.47
Step by Step Solution
- Step 1: Write the proportion equation
128,548.28 : 177,735.12 = 112,586.96 : x - Step 2: Convert to fraction form
128,548.28/177,735.12 = 112,586.96/x - Step 3: Cross multiply
128,548.28x = 177,735.12 × 112,586.96 - Step 4: Simplify right side
128,548.28x = 20,010,656,846.04 - Step 5: Solve for x
x = 20,010,656,846.04/128,548.28 - Step 6: Final answer
x = 155,666.47
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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.