Finding the Fourth Proportional to 80,421.65, 110,979.72 and 46,428.99
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Solution
The fourth proportional to 80,421.65, 110,979.72 and 46,428.99 is: 64,070.76
Step by Step Solution
- Step 1: Write the proportion equation
80,421.65 : 110,979.72 = 46,428.99 : x - Step 2: Convert to fraction form
80,421.65/110,979.72 = 46,428.99/x - Step 3: Cross multiply
80,421.65x = 110,979.72 × 46,428.99 - Step 4: Simplify right side
80,421.65x = 5,152,676,310.08 - Step 5: Solve for x
x = 5,152,676,310.08/80,421.65 - Step 6: Final answer
x = 64,070.76
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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.