Finding the Fourth Proportional to 128,974.68, 177,982.56 and 71,611.02
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Solution
The fourth proportional to 128,974.68, 177,982.56 and 71,611.02 is: 98,821.82
Step by Step Solution
- Step 1: Write the proportion equation
128,974.68 : 177,982.56 = 71,611.02 : x - Step 2: Convert to fraction form
128,974.68/177,982.56 = 71,611.02/x - Step 3: Cross multiply
128,974.68x = 177,982.56 × 71,611.02 - Step 4: Simplify right side
128,974.68x = 12,745,513,331.25 - Step 5: Solve for x
x = 12,745,513,331.25/128,974.68 - Step 6: Final answer
x = 98,821.82
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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.