Finding the Fourth Proportional to 138.10, 207.09 and 41.92
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Solution
The fourth proportional to 138.10, 207.09 and 41.92 is: 62.86
Step by Step Solution
- Step 1: Write the proportion equation
138.10 : 207.09 = 41.92 : x - Step 2: Convert to fraction form
138.10/207.09 = 41.92/x - Step 3: Cross multiply
138.10x = 207.09 × 41.92 - Step 4: Simplify right side
138.10x = 8,681.21 - Step 5: Solve for x
x = 8,681.21/138.10 - Step 6: Final answer
x = 62.86
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.