Finding the Fourth Proportional to 129,729.36, 179,024.14 and 73,140.80
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Solution
The fourth proportional to 129,729.36, 179,024.14 and 73,140.80 is: 100,932.96
Step by Step Solution
- Step 1: Write the proportion equation
129,729.36 : 179,024.14 = 73,140.80 : x - Step 2: Convert to fraction form
129,729.36/179,024.14 = 73,140.80/x - Step 3: Cross multiply
129,729.36x = 179,024.14 × 73,140.80 - Step 4: Simplify right side
129,729.36x = 13,093,968,818.91 - Step 5: Solve for x
x = 13,093,968,818.91/129,729.36 - Step 6: Final answer
x = 100,932.96
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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.