Finding the Fourth Proportional to 86,291.70, 129,475.26 and 30,172.08
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Solution
The fourth proportional to 86,291.70, 129,475.26 and 30,172.08 is: 45,271.31
Step by Step Solution
- Step 1: Write the proportion equation
86,291.70 : 129,475.26 = 30,172.08 : x - Step 2: Convert to fraction form
86,291.70/129,475.26 = 30,172.08/x - Step 3: Cross multiply
86,291.70x = 129,475.26 × 30,172.08 - Step 4: Simplify right side
86,291.70x = 3,906,537,902.74 - Step 5: Solve for x
x = 3,906,537,902.74/86,291.70 - Step 6: Final answer
x = 45,271.31
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.