Finding the Fourth Proportional to 81,305.10, 121,993.86 and 51,715.26
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Solution
The fourth proportional to 81,305.10, 121,993.86 and 51,715.26 is: 77,595.92
Step by Step Solution
- Step 1: Write the proportion equation
81,305.10 : 121,993.86 = 51,715.26 : x - Step 2: Convert to fraction form
81,305.10/121,993.86 = 51,715.26/x - Step 3: Cross multiply
81,305.10x = 121,993.86 × 51,715.26 - Step 4: Simplify right side
81,305.10x = 6,308,944,188.30 - Step 5: Solve for x
x = 6,308,944,188.30/81,305.10 - Step 6: Final answer
x = 77,595.92
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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.