Finding the Fourth Proportional to 317,786.68, 476,679.60 and 81,129.40
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Solution
The fourth proportional to 317,786.68, 476,679.60 and 81,129.40 is: 121,693.99
Step by Step Solution
- Step 1: Write the proportion equation
317,786.68 : 476,679.60 = 81,129.40 : x - Step 2: Convert to fraction form
317,786.68/476,679.60 = 81,129.40/x - Step 3: Cross multiply
317,786.68x = 476,679.60 × 81,129.40 - Step 4: Simplify right side
317,786.68x = 38,672,729,940.24 - Step 5: Solve for x
x = 38,672,729,940.24/317,786.68 - Step 6: Final answer
x = 121,693.99
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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.