Finding the Fourth Proportional to 212,977.80, 319,077.90 and 129,774.60
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Solution
The fourth proportional to 212,977.80, 319,077.90 and 129,774.60 is: 194,424.99
Step by Step Solution
- Step 1: Write the proportion equation
212,977.80 : 319,077.90 = 129,774.60 : x - Step 2: Convert to fraction form
212,977.80/319,077.90 = 129,774.60/x - Step 3: Cross multiply
212,977.80x = 319,077.90 × 129,774.60 - Step 4: Simplify right side
212,977.80x = 41,408,206,841.34 - Step 5: Solve for x
x = 41,408,206,841.34/212,977.80 - Step 6: Final answer
x = 194,424.99
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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.