Finding the Fourth Proportional to 129,129.21, 178,170.64 and 75,389.84
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Solution
The fourth proportional to 129,129.21, 178,170.64 and 75,389.84 is: 104,021.82
Step by Step Solution
- Step 1: Write the proportion equation
129,129.21 : 178,170.64 = 75,389.84 : x - Step 2: Convert to fraction form
129,129.21/178,170.64 = 75,389.84/x - Step 3: Cross multiply
129,129.21x = 178,170.64 × 75,389.84 - Step 4: Simplify right side
129,129.21x = 13,432,255,631.11 - Step 5: Solve for x
x = 13,432,255,631.11/129,129.21 - Step 6: Final answer
x = 104,021.82
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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.