Finding the Fourth Proportional to 138.95, 207.99 and 73.79
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Solution
The fourth proportional to 138.95, 207.99 and 73.79 is: 110.45
Step by Step Solution
- Step 1: Write the proportion equation
138.95 : 207.99 = 73.79 : x - Step 2: Convert to fraction form
138.95/207.99 = 73.79/x - Step 3: Cross multiply
138.95x = 207.99 × 73.79 - Step 4: Simplify right side
138.95x = 15,346.94 - Step 5: Solve for x
x = 15,346.94/138.95 - Step 6: Final answer
x = 110.45
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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.