Finding the Fourth Proportional to 129,483,239.40, 178,687,062.30 and 73,728,705.12
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Solution
The fourth proportional to 129,483,239.40, 178,687,062.30 and 73,728,705.12 is: 101,745,722.35
Step by Step Solution
- Step 1: Write the proportion equation
129,483,239.40 : 178,687,062.30 = 73,728,705.12 : x - Step 2: Convert to fraction form
129,483,239.40/178,687,062.30 = 73,728,705.12/x - Step 3: Cross multiply
129,483,239.40x = 178,687,062.30 × 73,728,705.12 - Step 4: Simplify right side
129,483,239.40x = 13,174,365,725,075,770 - Step 5: Solve for x
x = 13,174,365,725,075,770/129,483,239.40 - Step 6: Final answer
x = 101,745,722.35
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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.