Finding the Fourth Proportional to 87,837.30, 121,235.40 and 68,679.18
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Solution
The fourth proportional to 87,837.30, 121,235.40 and 68,679.18 is: 94,792.85
Step by Step Solution
- Step 1: Write the proportion equation
87,837.30 : 121,235.40 = 68,679.18 : x - Step 2: Convert to fraction form
87,837.30/121,235.40 = 68,679.18/x - Step 3: Cross multiply
87,837.30x = 121,235.40 × 68,679.18 - Step 4: Simplify right side
87,837.30x = 8,326,347,858.97 - Step 5: Solve for x
x = 8,326,347,858.97/87,837.30 - Step 6: Final answer
x = 94,792.85
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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.