Finding the Fourth Proportional to 79,439.99, 119,159.88 and 20,275.65
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Solution
The fourth proportional to 79,439.99, 119,159.88 and 20,275.65 is: 30,413.45
Step by Step Solution
- Step 1: Write the proportion equation
79,439.99 : 119,159.88 = 20,275.65 : x - Step 2: Convert to fraction form
79,439.99/119,159.88 = 20,275.65/x - Step 3: Cross multiply
79,439.99x = 119,159.88 × 20,275.65 - Step 4: Simplify right side
79,439.99x = 2,416,044,020.92 - Step 5: Solve for x
x = 2,416,044,020.92/79,439.99 - Step 6: Final answer
x = 30,413.45
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Double scale
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Similar ratio
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1.5x scale
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.