Finding the Fourth Proportional to 128,440.62, 177,243.21 and 71,851.95
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Solution
The fourth proportional to 128,440.62, 177,243.21 and 71,851.95 is: 99,152.98
Step by Step Solution
- Step 1: Write the proportion equation
128,440.62 : 177,243.21 = 71,851.95 : x - Step 2: Convert to fraction form
128,440.62/177,243.21 = 71,851.95/x - Step 3: Cross multiply
128,440.62x = 177,243.21 × 71,851.95 - Step 4: Simplify right side
128,440.62x = 12,735,270,262.76 - Step 5: Solve for x
x = 12,735,270,262.76/128,440.62 - Step 6: Final answer
x = 99,152.98
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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.