Finding the Fourth Proportional to 79,878.66, 119,779.26 and 28,570.12
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Solution
The fourth proportional to 79,878.66, 119,779.26 and 28,570.12 is: 42,841.32
Step by Step Solution
- Step 1: Write the proportion equation
79,878.66 : 119,779.26 = 28,570.12 : x - Step 2: Convert to fraction form
79,878.66/119,779.26 = 28,570.12/x - Step 3: Cross multiply
79,878.66x = 119,779.26 × 28,570.12 - Step 4: Simplify right side
79,878.66x = 3,422,107,425.13 - Step 5: Solve for x
x = 3,422,107,425.13/79,878.66 - Step 6: Final answer
x = 42,841.32
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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.