Finding the Fourth Proportional to 138.34, 207.07 and 133.58
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Solution
The fourth proportional to 138.34, 207.07 and 133.58 is: 199.95
Step by Step Solution
- Step 1: Write the proportion equation
138.34 : 207.07 = 133.58 : x - Step 2: Convert to fraction form
138.34/207.07 = 133.58/x - Step 3: Cross multiply
138.34x = 207.07 × 133.58 - Step 4: Simplify right side
138.34x = 27,660.41 - Step 5: Solve for x
x = 27,660.41/138.34 - Step 6: Final answer
x = 199.95
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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.