Finding the Fourth Proportional to 87,720.40, 131,726.40 and 48,305.80
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Solution
The fourth proportional to 87,720.40, 131,726.40 and 48,305.80 is: 72,538.99
Step by Step Solution
- Step 1: Write the proportion equation
87,720.40 : 131,726.40 = 48,305.80 : x - Step 2: Convert to fraction form
87,720.40/131,726.40 = 48,305.80/x - Step 3: Cross multiply
87,720.40x = 131,726.40 × 48,305.80 - Step 4: Simplify right side
87,720.40x = 6,363,149,133.12 - Step 5: Solve for x
x = 6,363,149,133.12/87,720.40 - Step 6: Final answer
x = 72,538.99
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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.