Finding the Fourth Proportional to 129,122.26, 178,209.90 and 107,577.88
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Solution
The fourth proportional to 129,122.26, 178,209.90 and 107,577.88 is: 148,475.12
Step by Step Solution
- Step 1: Write the proportion equation
129,122.26 : 178,209.90 = 107,577.88 : x - Step 2: Convert to fraction form
129,122.26/178,209.90 = 107,577.88/x - Step 3: Cross multiply
129,122.26x = 178,209.90 × 107,577.88 - Step 4: Simplify right side
129,122.26x = 19,171,443,237.01 - Step 5: Solve for x
x = 19,171,443,237.01/129,122.26 - Step 6: Final answer
x = 148,475.12
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.