Finding the Fourth Proportional to 87,856.80, 121,262.32 and 68,698.68
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Solution
The fourth proportional to 87,856.80, 121,262.32 and 68,698.68 is: 94,819.77
Step by Step Solution
- Step 1: Write the proportion equation
87,856.80 : 121,262.32 = 68,698.68 : x - Step 2: Convert to fraction form
87,856.80/121,262.32 = 68,698.68/x - Step 3: Cross multiply
87,856.80x = 121,262.32 × 68,698.68 - Step 4: Simplify right side
87,856.80x = 8,330,561,317.74 - Step 5: Solve for x
x = 8,330,561,317.74/87,856.80 - Step 6: Final answer
x = 94,819.77
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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.