Finding the Fourth Proportional to 100,409.24, 138,507.18 and 62,617.88
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Solution
The fourth proportional to 100,409.24, 138,507.18 and 62,617.88 is: 86,376.77
Step by Step Solution
- Step 1: Write the proportion equation
100,409.24 : 138,507.18 = 62,617.88 : x - Step 2: Convert to fraction form
100,409.24/138,507.18 = 62,617.88/x - Step 3: Cross multiply
100,409.24x = 138,507.18 × 62,617.88 - Step 4: Simplify right side
100,409.24x = 8,673,025,976.38 - Step 5: Solve for x
x = 8,673,025,976.38/100,409.24 - Step 6: Final answer
x = 86,376.77
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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.