Finding the Fourth Proportional to 157,938.49, 217,955.51 and 86,319.37
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Solution
The fourth proportional to 157,938.49, 217,955.51 and 86,319.37 is: 119,120.95
Step by Step Solution
- Step 1: Write the proportion equation
157,938.49 : 217,955.51 = 86,319.37 : x - Step 2: Convert to fraction form
157,938.49/217,955.51 = 86,319.37/x - Step 3: Cross multiply
157,938.49x = 217,955.51 × 86,319.37 - Step 4: Simplify right side
157,938.49x = 18,813,782,311.23 - Step 5: Solve for x
x = 18,813,782,311.23/157,938.49 - Step 6: Final answer
x = 119,120.95
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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.