Finding the Fourth Proportional to 212,878.68, 319,144.86 and 79,684.32
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Solution
The fourth proportional to 212,878.68, 319,144.86 and 79,684.32 is: 119,461.66
Step by Step Solution
- Step 1: Write the proportion equation
212,878.68 : 319,144.86 = 79,684.32 : x - Step 2: Convert to fraction form
212,878.68/319,144.86 = 79,684.32/x - Step 3: Cross multiply
212,878.68x = 319,144.86 × 79,684.32 - Step 4: Simplify right side
212,878.68x = 25,430,841,150.60 - Step 5: Solve for x
x = 25,430,841,150.60/212,878.68 - Step 6: Final answer
x = 119,461.66
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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.