Finding the Fourth Proportional to 129,871.88, 179,221.44 and 72,512.08
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Solution
The fourth proportional to 129,871.88, 179,221.44 and 72,512.08 is: 100,065.69
Step by Step Solution
- Step 1: Write the proportion equation
129,871.88 : 179,221.44 = 72,512.08 : x - Step 2: Convert to fraction form
129,871.88/179,221.44 = 72,512.08/x - Step 3: Cross multiply
129,871.88x = 179,221.44 × 72,512.08 - Step 4: Simplify right side
129,871.88x = 12,995,718,946.94 - Step 5: Solve for x
x = 12,995,718,946.94/129,871.88 - Step 6: Final answer
x = 100,065.69
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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.