Finding the Fourth Proportional to 129,284.24, 178,396.20 and 74,845.68
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Solution
The fourth proportional to 129,284.24, 178,396.20 and 74,845.68 is: 103,277.75
Step by Step Solution
- Step 1: Write the proportion equation
129,284.24 : 178,396.20 = 74,845.68 : x - Step 2: Convert to fraction form
129,284.24/178,396.20 = 74,845.68/x - Step 3: Cross multiply
129,284.24x = 178,396.20 × 74,845.68 - Step 4: Simplify right side
129,284.24x = 13,352,184,898.42 - Step 5: Solve for x
x = 13,352,184,898.42/129,284.24 - Step 6: Final answer
x = 103,277.75
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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.