Finding the Fourth Proportional to 138,743.80, 208,115.70 and 115,415.80
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Solution
The fourth proportional to 138,743.80, 208,115.70 and 115,415.80 is: 173,123.70
Step by Step Solution
- Step 1: Write the proportion equation
138,743.80 : 208,115.70 = 115,415.80 : x - Step 2: Convert to fraction form
138,743.80/208,115.70 = 115,415.80/x - Step 3: Cross multiply
138,743.80x = 208,115.70 × 115,415.80 - Step 4: Simplify right side
138,743.80x = 24,019,840,008.06 - Step 5: Solve for x
x = 24,019,840,008.06/138,743.80 - Step 6: Final answer
x = 173,123.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.