Finding the Fourth Proportional to 212,899.32, 318,987.45 and 128,482.09
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Solution
The fourth proportional to 212,899.32, 318,987.45 and 128,482.09 is: 192,504.95
Step by Step Solution
- Step 1: Write the proportion equation
212,899.32 : 318,987.45 = 128,482.09 : x - Step 2: Convert to fraction form
212,899.32/318,987.45 = 128,482.09/x - Step 3: Cross multiply
212,899.32x = 318,987.45 × 128,482.09 - Step 4: Simplify right side
212,899.32x = 40,984,173,462.30 - Step 5: Solve for x
x = 40,984,173,462.30/212,899.32 - Step 6: Final answer
x = 192,504.95
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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.