Finding the Fourth Proportional to 115,198.68, 158,941.06 and 74,971.65
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Solution
The fourth proportional to 115,198.68, 158,941.06 and 74,971.65 is: 103,439.32
Step by Step Solution
- Step 1: Write the proportion equation
115,198.68 : 158,941.06 = 74,971.65 : x - Step 2: Convert to fraction form
115,198.68/158,941.06 = 74,971.65/x - Step 3: Cross multiply
115,198.68x = 158,941.06 × 74,971.65 - Step 4: Simplify right side
115,198.68x = 11,916,073,333.52 - Step 5: Solve for x
x = 11,916,073,333.52/115,198.68 - Step 6: Final answer
x = 103,439.32
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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.