Finding the Fourth Proportional to 155,891.18, 215,128.49 and 84,270.57
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Solution
The fourth proportional to 155,891.18, 215,128.49 and 84,270.57 is: 116,292.66
Step by Step Solution
- Step 1: Write the proportion equation
155,891.18 : 215,128.49 = 84,270.57 : x - Step 2: Convert to fraction form
155,891.18/215,128.49 = 84,270.57/x - Step 3: Cross multiply
155,891.18x = 215,128.49 × 84,270.57 - Step 4: Simplify right side
155,891.18x = 18,129,000,054.19 - Step 5: Solve for x
x = 18,129,000,054.19/155,891.18 - Step 6: Final answer
x = 116,292.66
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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.