Finding the Fourth Proportional to 137,976.81, 190,423.74 and 76,729.08
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Solution
The fourth proportional to 137,976.81, 190,423.74 and 76,729.08 is: 105,894.88
Step by Step Solution
- Step 1: Write the proportion equation
137,976.81 : 190,423.74 = 76,729.08 : x - Step 2: Convert to fraction form
137,976.81/190,423.74 = 76,729.08/x - Step 3: Cross multiply
137,976.81x = 190,423.74 × 76,729.08 - Step 4: Simplify right side
137,976.81x = 14,611,038,380.36 - Step 5: Solve for x
x = 14,611,038,380.36/137,976.81 - Step 6: Final answer
x = 105,894.88
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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.