Finding the Fourth Proportional to 100,681.43, 138,939.12 and 55,359.05
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Solution
The fourth proportional to 100,681.43, 138,939.12 and 55,359.05 is: 76,394.79
Step by Step Solution
- Step 1: Write the proportion equation
100,681.43 : 138,939.12 = 55,359.05 : x - Step 2: Convert to fraction form
100,681.43/138,939.12 = 55,359.05/x - Step 3: Cross multiply
100,681.43x = 138,939.12 × 55,359.05 - Step 4: Simplify right side
100,681.43x = 7,691,537,152.04 - Step 5: Solve for x
x = 7,691,537,152.04/100,681.43 - Step 6: Final answer
x = 76,394.79
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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.