Finding the Fourth Proportional to 211,897.81, 292,469.40 and 121,306.09
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Solution
The fourth proportional to 211,897.81, 292,469.40 and 121,306.09 is: 167,431.27
Step by Step Solution
- Step 1: Write the proportion equation
211,897.81 : 292,469.40 = 121,306.09 : x - Step 2: Convert to fraction form
211,897.81/292,469.40 = 121,306.09/x - Step 3: Cross multiply
211,897.81x = 292,469.40 × 121,306.09 - Step 4: Simplify right side
211,897.81x = 35,478,319,358.65 - Step 5: Solve for x
x = 35,478,319,358.65/211,897.81 - Step 6: Final answer
x = 167,431.27
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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.