Finding the Fourth Proportional to 75,140.55, 112,707.68 and 18,979.83
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Solution
The fourth proportional to 75,140.55, 112,707.68 and 18,979.83 is: 28,468.95
Step by Step Solution
- Step 1: Write the proportion equation
75,140.55 : 112,707.68 = 18,979.83 : x - Step 2: Convert to fraction form
75,140.55/112,707.68 = 18,979.83/x - Step 3: Cross multiply
75,140.55x = 112,707.68 × 18,979.83 - Step 4: Simplify right side
75,140.55x = 2,139,172,511.20 - Step 5: Solve for x
x = 2,139,172,511.20/75,140.55 - Step 6: Final answer
x = 28,468.95
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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.