Finding the Fourth Proportional to 128,412.44, 177,199.53 and 71,812.88
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Solution
The fourth proportional to 128,412.44, 177,199.53 and 71,812.88 is: 99,096.38
Step by Step Solution
- Step 1: Write the proportion equation
128,412.44 : 177,199.53 = 71,812.88 : x - Step 2: Convert to fraction form
128,412.44/177,199.53 = 71,812.88/x - Step 3: Cross multiply
128,412.44x = 177,199.53 × 71,812.88 - Step 4: Simplify right side
128,412.44x = 12,725,208,583.95 - Step 5: Solve for x
x = 12,725,208,583.95/128,412.44 - Step 6: Final answer
x = 99,096.38
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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.