Finding the Fourth Proportional to 87,909.86, 121,316.19 and 47,623.62
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Solution
The fourth proportional to 87,909.86, 121,316.19 and 47,623.62 is: 65,720.92
Step by Step Solution
- Step 1: Write the proportion equation
87,909.86 : 121,316.19 = 47,623.62 : x - Step 2: Convert to fraction form
87,909.86/121,316.19 = 47,623.62/x - Step 3: Cross multiply
87,909.86x = 121,316.19 × 47,623.62 - Step 4: Simplify right side
87,909.86x = 5,777,516,132.41 - Step 5: Solve for x
x = 5,777,516,132.41/87,909.86 - Step 6: Final answer
x = 65,720.92
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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.