Finding the Fourth Proportional to 157,939.17, 217,956.06 and 86,319.18
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Solution
The fourth proportional to 157,939.17, 217,956.06 and 86,319.18 is: 119,120.47
Step by Step Solution
- Step 1: Write the proportion equation
157,939.17 : 217,956.06 = 86,319.18 : x - Step 2: Convert to fraction form
157,939.17/217,956.06 = 86,319.18/x - Step 3: Cross multiply
157,939.17x = 217,956.06 × 86,319.18 - Step 4: Simplify right side
157,939.17x = 18,813,788,375.23 - Step 5: Solve for x
x = 18,813,788,375.23/157,939.17 - Step 6: Final answer
x = 119,120.47
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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.