Finding the Fourth Proportional to 121,403.80, 182,105.70 and 68,915.80
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Solution
The fourth proportional to 121,403.80, 182,105.70 and 68,915.80 is: 103,373.70
Step by Step Solution
- Step 1: Write the proportion equation
121,403.80 : 182,105.70 = 68,915.80 : x - Step 2: Convert to fraction form
121,403.80/182,105.70 = 68,915.80/x - Step 3: Cross multiply
121,403.80x = 182,105.70 × 68,915.80 - Step 4: Simplify right side
121,403.80x = 12,549,960,000.06 - Step 5: Solve for x
x = 12,549,960,000.06/121,403.80 - Step 6: Final answer
x = 103,373.70
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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.