Finding the Fourth Proportional to 77.00, 115.58 and 42.75
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Solution
The fourth proportional to 77.00, 115.58 and 42.75 is: 64.17
Step by Step Solution
- Step 1: Write the proportion equation
77.00 : 115.58 = 42.75 : x - Step 2: Convert to fraction form
77.00/115.58 = 42.75/x - Step 3: Cross multiply
77.00x = 115.58 × 42.75 - Step 4: Simplify right side
77.00x = 4,941.15 - Step 5: Solve for x
x = 4,941.15/77.00 - Step 6: Final answer
x = 64.17
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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.