Finding the Fourth Proportional to 137,431.62, 206,115.12 and 77,485.95
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Solution
The fourth proportional to 137,431.62, 206,115.12 and 77,485.95 is: 116,210.71
Step by Step Solution
- Step 1: Write the proportion equation
137,431.62 : 206,115.12 = 77,485.95 : x - Step 2: Convert to fraction form
137,431.62/206,115.12 = 77,485.95/x - Step 3: Cross multiply
137,431.62x = 206,115.12 × 77,485.95 - Step 4: Simplify right side
137,431.62x = 15,971,025,882.56 - Step 5: Solve for x
x = 15,971,025,882.56/137,431.62 - Step 6: Final answer
x = 116,210.71
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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.