Finding the Fourth Proportional to 103,415.15, 154,958.70 and 68,313.80
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Solution
The fourth proportional to 103,415.15, 154,958.70 and 68,313.80 is: 102,362.35
Step by Step Solution
- Step 1: Write the proportion equation
103,415.15 : 154,958.70 = 68,313.80 : x - Step 2: Convert to fraction form
103,415.15/154,958.70 = 68,313.80/x - Step 3: Cross multiply
103,415.15x = 154,958.70 × 68,313.80 - Step 4: Simplify right side
103,415.15x = 10,585,817,640.06 - Step 5: Solve for x
x = 10,585,817,640.06/103,415.15 - Step 6: Final answer
x = 102,362.35
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.