Finding the Fourth Proportional to 212,860.23, 318,929.01 and 128,442.99
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Solution
The fourth proportional to 212,860.23, 318,929.01 and 128,442.99 is: 192,446.45
Step by Step Solution
- Step 1: Write the proportion equation
212,860.23 : 318,929.01 = 128,442.99 : x - Step 2: Convert to fraction form
212,860.23/318,929.01 = 128,442.99/x - Step 3: Cross multiply
212,860.23x = 318,929.01 × 128,442.99 - Step 4: Simplify right side
212,860.23x = 40,964,195,642.14 - Step 5: Solve for x
x = 40,964,195,642.14/212,860.23 - Step 6: Final answer
x = 192,446.45
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1.5x scale
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.