Finding the Fourth Proportional to 128,975.06, 177,976.91 and 71,611.43
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Solution
The fourth proportional to 128,975.06, 177,976.91 and 71,611.43 is: 98,818.95
Step by Step Solution
- Step 1: Write the proportion equation
128,975.06 : 177,976.91 = 71,611.43 : x - Step 2: Convert to fraction form
128,975.06/177,976.91 = 71,611.43/x - Step 3: Cross multiply
128,975.06x = 177,976.91 × 71,611.43 - Step 4: Simplify right side
128,975.06x = 12,745,179,784.14 - Step 5: Solve for x
x = 12,745,179,784.14/128,975.06 - Step 6: Final answer
x = 98,818.95
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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.