Finding the Fourth Proportional to 81,294.12, 121,938.12 and 28,702.26
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Solution
The fourth proportional to 81,294.12, 121,938.12 and 28,702.26 is: 43,052.31
Step by Step Solution
- Step 1: Write the proportion equation
81,294.12 : 121,938.12 = 28,702.26 : x - Step 2: Convert to fraction form
81,294.12/121,938.12 = 28,702.26/x - Step 3: Cross multiply
81,294.12x = 121,938.12 × 28,702.26 - Step 4: Simplify right side
81,294.12x = 3,499,899,624.15 - Step 5: Solve for x
x = 3,499,899,624.15/81,294.12 - Step 6: Final answer
x = 43,052.31
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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.