Finding the Fourth Proportional to 79,707.12, 119,567.68 and 20,542.70
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Solution
The fourth proportional to 79,707.12, 119,567.68 and 20,542.70 is: 30,815.85
Step by Step Solution
- Step 1: Write the proportion equation
79,707.12 : 119,567.68 = 20,542.70 : x - Step 2: Convert to fraction form
79,707.12/119,567.68 = 20,542.70/x - Step 3: Cross multiply
79,707.12x = 119,567.68 × 20,542.70 - Step 4: Simplify right side
79,707.12x = 2,456,242,979.94 - Step 5: Solve for x
x = 2,456,242,979.94/79,707.12 - Step 6: Final answer
x = 30,815.85
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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.