Finding the Fourth Proportional to 218,743.08, 328,141.95 and 85,606.12
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Solution
The fourth proportional to 218,743.08, 328,141.95 and 85,606.12 is: 128,419.88
Step by Step Solution
- Step 1: Write the proportion equation
218,743.08 : 328,141.95 = 85,606.12 : x - Step 2: Convert to fraction form
218,743.08/328,141.95 = 85,606.12/x - Step 3: Cross multiply
218,743.08x = 328,141.95 × 85,606.12 - Step 4: Simplify right side
218,743.08x = 28,090,959,148.73 - Step 5: Solve for x
x = 28,090,959,148.73/218,743.08 - Step 6: Final answer
x = 128,419.88
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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.