Finding the Fourth Proportional to 128,472.54, 177,278.24 and 71,102.75
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Solution
The fourth proportional to 128,472.54, 177,278.24 and 71,102.75 is: 98,114.11
Step by Step Solution
- Step 1: Write the proportion equation
128,472.54 : 177,278.24 = 71,102.75 : x - Step 2: Convert to fraction form
128,472.54/177,278.24 = 71,102.75/x - Step 3: Cross multiply
128,472.54x = 177,278.24 × 71,102.75 - Step 4: Simplify right side
128,472.54x = 12,604,969,137.26 - Step 5: Solve for x
x = 12,604,969,137.26/128,472.54 - Step 6: Final answer
x = 98,114.11
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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.