Finding the Fourth Proportional to 98,918.21, 136,431.79 and 85,143.99
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Solution
The fourth proportional to 98,918.21, 136,431.79 and 85,143.99 is: 117,433.85
Step by Step Solution
- Step 1: Write the proportion equation
98,918.21 : 136,431.79 = 85,143.99 : x - Step 2: Convert to fraction form
98,918.21/136,431.79 = 85,143.99/x - Step 3: Cross multiply
98,918.21x = 136,431.79 × 85,143.99 - Step 4: Simplify right side
98,918.21x = 11,616,346,750.58 - Step 5: Solve for x
x = 11,616,346,750.58/98,918.21 - Step 6: Final answer
x = 117,433.85
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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.