Finding the Fourth Proportional to 153,868.75, 212,346.21 and 86,800.75
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Solution
The fourth proportional to 153,868.75, 212,346.21 and 86,800.75 is: 119,789.17
Step by Step Solution
- Step 1: Write the proportion equation
153,868.75 : 212,346.21 = 86,800.75 : x - Step 2: Convert to fraction form
153,868.75/212,346.21 = 86,800.75/x - Step 3: Cross multiply
153,868.75x = 212,346.21 × 86,800.75 - Step 4: Simplify right side
153,868.75x = 18,431,810,287.66 - Step 5: Solve for x
x = 18,431,810,287.66/153,868.75 - Step 6: Final answer
x = 119,789.17
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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.