Finding the Fourth Proportional to 157,639.58, 217,543.18 and 86,021.18
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Solution
The fourth proportional to 157,639.58, 217,543.18 and 86,021.18 is: 118,709.53
Step by Step Solution
- Step 1: Write the proportion equation
157,639.58 : 217,543.18 = 86,021.18 : x - Step 2: Convert to fraction form
157,639.58/217,543.18 = 86,021.18/x - Step 3: Cross multiply
157,639.58x = 217,543.18 × 86,021.18 - Step 4: Simplify right side
157,639.58x = 18,713,321,044.55 - Step 5: Solve for x
x = 18,713,321,044.55/157,639.58 - Step 6: Final answer
x = 118,709.53
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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.