Finding the Fourth Proportional to 153,697.80, 212,098.74 and 85,716.84
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Solution
The fourth proportional to 153,697.80, 212,098.74 and 85,716.84 is: 118,286.88
Step by Step Solution
- Step 1: Write the proportion equation
153,697.80 : 212,098.74 = 85,716.84 : x - Step 2: Convert to fraction form
153,697.80/212,098.74 = 85,716.84/x - Step 3: Cross multiply
153,697.80x = 212,098.74 × 85,716.84 - Step 4: Simplify right side
153,697.80x = 18,180,433,760.78 - Step 5: Solve for x
x = 18,180,433,760.78/153,697.80 - Step 6: Final answer
x = 118,286.88
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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.