Finding the Fourth Proportional to 128,918.09, 177,904.22 and 71,554.07
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Solution
The fourth proportional to 128,918.09, 177,904.22 and 71,554.07 is: 98,743.09
Step by Step Solution
- Step 1: Write the proportion equation
128,918.09 : 177,904.22 = 71,554.07 : x - Step 2: Convert to fraction form
128,918.09/177,904.22 = 71,554.07/x - Step 3: Cross multiply
128,918.09x = 177,904.22 × 71,554.07 - Step 4: Simplify right side
128,918.09x = 12,729,771,098.17 - Step 5: Solve for x
x = 12,729,771,098.17/128,918.09 - Step 6: Final answer
x = 98,743.09
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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.