Finding the Fourth Proportional to 157,641.28, 217,544.10 and 86,021.08
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Solution
The fourth proportional to 157,641.28, 217,544.10 and 86,021.08 is: 118,708.62
Step by Step Solution
- Step 1: Write the proportion equation
157,641.28 : 217,544.10 = 86,021.08 : x - Step 2: Convert to fraction form
157,641.28/217,544.10 = 86,021.08/x - Step 3: Cross multiply
157,641.28x = 217,544.10 × 86,021.08 - Step 4: Simplify right side
157,641.28x = 18,713,378,429.63 - Step 5: Solve for x
x = 18,713,378,429.63/157,641.28 - Step 6: Final answer
x = 118,708.62
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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.