Finding the Fourth Proportional to 87,811.20, 121,146.84 and 55,972.80
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Solution
The fourth proportional to 87,811.20, 121,146.84 and 55,972.80 is: 77,221.67
Step by Step Solution
- Step 1: Write the proportion equation
87,811.20 : 121,146.84 = 55,972.80 : x - Step 2: Convert to fraction form
87,811.20/121,146.84 = 55,972.80/x - Step 3: Cross multiply
87,811.20x = 121,146.84 × 55,972.80 - Step 4: Simplify right side
87,811.20x = 6,780,927,845.95 - Step 5: Solve for x
x = 6,780,927,845.95/87,811.20 - Step 6: Final answer
x = 77,221.67
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1.5x scale
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.