Finding the Fourth Proportional to 157,665.12, 217,578.48 and 86,046.75
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Solution
The fourth proportional to 157,665.12, 217,578.48 and 86,046.75 is: 118,744.85
Step by Step Solution
- Step 1: Write the proportion equation
157,665.12 : 217,578.48 = 86,046.75 : x - Step 2: Convert to fraction form
157,665.12/217,578.48 = 86,046.75/x - Step 3: Cross multiply
157,665.12x = 217,578.48 × 86,046.75 - Step 4: Simplify right side
157,665.12x = 18,721,921,073.94 - Step 5: Solve for x
x = 18,721,921,073.94/157,665.12 - Step 6: Final answer
x = 118,744.85
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1.5x scale
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.