Finding the Fourth Proportional to 212,653.80, 318,980.70 and 86,293.80
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Solution
The fourth proportional to 212,653.80, 318,980.70 and 86,293.80 is: 129,440.70
Step by Step Solution
- Step 1: Write the proportion equation
212,653.80 : 318,980.70 = 86,293.80 : x - Step 2: Convert to fraction form
212,653.80/318,980.70 = 86,293.80/x - Step 3: Cross multiply
212,653.80x = 318,980.70 × 86,293.80 - Step 4: Simplify right side
212,653.80x = 27,526,056,729.66 - Step 5: Solve for x
x = 27,526,056,729.66/212,653.80 - Step 6: Final answer
x = 129,440.70
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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.