Finding the Fourth Proportional to 207,918.66, 286,931.49 and 121,939.66
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Solution
The fourth proportional to 207,918.66, 286,931.49 and 121,939.66 is: 168,278.92
Step by Step Solution
- Step 1: Write the proportion equation
207,918.66 : 286,931.49 = 121,939.66 : x - Step 2: Convert to fraction form
207,918.66/286,931.49 = 121,939.66/x - Step 3: Cross multiply
207,918.66x = 286,931.49 × 121,939.66 - Step 4: Simplify right side
207,918.66x = 34,988,328,333.89 - Step 5: Solve for x
x = 34,988,328,333.89/207,918.66 - Step 6: Final answer
x = 168,278.92
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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.