Finding the Fourth Proportional to 138,108.46, 207,139.62 and 38,278.75
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Solution
The fourth proportional to 138,108.46, 207,139.62 and 38,278.75 is: 57,411.73
Step by Step Solution
- Step 1: Write the proportion equation
138,108.46 : 207,139.62 = 38,278.75 : x - Step 2: Convert to fraction form
138,108.46/207,139.62 = 38,278.75/x - Step 3: Cross multiply
138,108.46x = 207,139.62 × 38,278.75 - Step 4: Simplify right side
138,108.46x = 7,929,045,729.08 - Step 5: Solve for x
x = 7,929,045,729.08/138,108.46 - Step 6: Final answer
x = 57,411.73
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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.