Finding the Fourth Proportional to 138,830.20, 207,953.70 and 115,502.20
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Solution
The fourth proportional to 138,830.20, 207,953.70 and 115,502.20 is: 173,010.70
Step by Step Solution
- Step 1: Write the proportion equation
138,830.20 : 207,953.70 = 115,502.20 : x - Step 2: Convert to fraction form
138,830.20/207,953.70 = 115,502.20/x - Step 3: Cross multiply
138,830.20x = 207,953.70 × 115,502.20 - Step 4: Simplify right side
138,830.20x = 24,019,109,848.14 - Step 5: Solve for x
x = 24,019,109,848.14/138,830.20 - Step 6: Final answer
x = 173,010.70
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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.