Finding the Fourth Proportional to 212,584.58, 318,921.84 and 70,421.80
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Solution
The fourth proportional to 212,584.58, 318,921.84 and 70,421.80 is: 105,647.60
Step by Step Solution
- Step 1: Write the proportion equation
212,584.58 : 318,921.84 = 70,421.80 : x - Step 2: Convert to fraction form
212,584.58/318,921.84 = 70,421.80/x - Step 3: Cross multiply
212,584.58x = 318,921.84 × 70,421.80 - Step 4: Simplify right side
212,584.58x = 22,459,050,032.11 - Step 5: Solve for x
x = 22,459,050,032.11/212,584.58 - Step 6: Final answer
x = 105,647.60
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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.