Finding the Fourth Proportional to 128,268.18, 177,008.80 and 71,679.56
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Solution
The fourth proportional to 128,268.18, 177,008.80 and 71,679.56 is: 98,917.07
Step by Step Solution
- Step 1: Write the proportion equation
128,268.18 : 177,008.80 = 71,679.56 : x - Step 2: Convert to fraction form
128,268.18/177,008.80 = 71,679.56/x - Step 3: Cross multiply
128,268.18x = 177,008.80 × 71,679.56 - Step 4: Simplify right side
128,268.18x = 12,687,912,900.13 - Step 5: Solve for x
x = 12,687,912,900.13/128,268.18 - Step 6: Final answer
x = 98,917.07
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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.