Finding the Fourth Proportional to 129,861.98, 179,212.33 and 71,718.54
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Solution
The fourth proportional to 129,861.98, 179,212.33 and 71,718.54 is: 98,973.12
Step by Step Solution
- Step 1: Write the proportion equation
129,861.98 : 179,212.33 = 71,718.54 : x - Step 2: Convert to fraction form
129,861.98/179,212.33 = 71,718.54/x - Step 3: Cross multiply
129,861.98x = 179,212.33 × 71,718.54 - Step 4: Simplify right side
129,861.98x = 12,852,845,761.54 - Step 5: Solve for x
x = 12,852,845,761.54/129,861.98 - Step 6: Final answer
x = 98,973.12
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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.