Finding the Fourth Proportional to 137,396.16, 189,609.80 and 76,963.68
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Solution
The fourth proportional to 137,396.16, 189,609.80 and 76,963.68 is: 106,211.61
Step by Step Solution
- Step 1: Write the proportion equation
137,396.16 : 189,609.80 = 76,963.68 : x - Step 2: Convert to fraction form
137,396.16/189,609.80 = 76,963.68/x - Step 3: Cross multiply
137,396.16x = 189,609.80 × 76,963.68 - Step 4: Simplify right side
137,396.16x = 14,593,067,587.25 - Step 5: Solve for x
x = 14,593,067,587.25/137,396.16 - Step 6: Final answer
x = 106,211.61
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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.