Finding the Fourth Proportional to 128,700.09, 177,607.26 and 71,340.66
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Solution
The fourth proportional to 128,700.09, 177,607.26 and 71,340.66 is: 98,450.74
Step by Step Solution
- Step 1: Write the proportion equation
128,700.09 : 177,607.26 = 71,340.66 : x - Step 2: Convert to fraction form
128,700.09/177,607.26 = 71,340.66/x - Step 3: Cross multiply
128,700.09x = 177,607.26 × 71,340.66 - Step 4: Simplify right side
128,700.09x = 12,670,619,149.19 - Step 5: Solve for x
x = 12,670,619,149.19/128,700.09 - Step 6: Final answer
x = 98,450.74
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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.