Finding the Fourth Proportional to 158,542.63, 218,782.99 and 86,921.07
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Solution
The fourth proportional to 158,542.63, 218,782.99 and 86,921.07 is: 119,947.87
Step by Step Solution
- Step 1: Write the proportion equation
158,542.63 : 218,782.99 = 86,921.07 : x - Step 2: Convert to fraction form
158,542.63/218,782.99 = 86,921.07/x - Step 3: Cross multiply
158,542.63x = 218,782.99 × 86,921.07 - Step 4: Simplify right side
158,542.63x = 19,016,851,153.99 - Step 5: Solve for x
x = 19,016,851,153.99/158,542.63 - Step 6: Final answer
x = 119,947.87
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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.