Finding the Fourth Proportional to 317,786.22, 476,678.79 and 81,129.06
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Solution
The fourth proportional to 317,786.22, 476,678.79 and 81,129.06 is: 121,693.45
Step by Step Solution
- Step 1: Write the proportion equation
317,786.22 : 476,678.79 = 81,129.06 : x - Step 2: Convert to fraction form
317,786.22/476,678.79 = 81,129.06/x - Step 3: Cross multiply
317,786.22x = 476,678.79 × 81,129.06 - Step 4: Simplify right side
317,786.22x = 38,672,502,154.64 - Step 5: Solve for x
x = 38,672,502,154.64/317,786.22 - Step 6: Final answer
x = 121,693.45
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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.