Finding the Fourth Proportional to 128,571.30, 177,426.45 and 71,984.70
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Solution
The fourth proportional to 128,571.30, 177,426.45 and 71,984.70 is: 99,337.80
Step by Step Solution
- Step 1: Write the proportion equation
128,571.30 : 177,426.45 = 71,984.70 : x - Step 2: Convert to fraction form
128,571.30/177,426.45 = 71,984.70/x - Step 3: Cross multiply
128,571.30x = 177,426.45 × 71,984.70 - Step 4: Simplify right side
128,571.30x = 12,771,989,775.32 - Step 5: Solve for x
x = 12,771,989,775.32/128,571.30 - Step 6: Final answer
x = 99,337.80
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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.