Finding the Fourth Proportional to 66.02, 91.02 and 55.12
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Solution
The fourth proportional to 66.02, 91.02 and 55.12 is: 75.99
Step by Step Solution
- Step 1: Write the proportion equation
66.02 : 91.02 = 55.12 : x - Step 2: Convert to fraction form
66.02/91.02 = 55.12/x - Step 3: Cross multiply
66.02x = 91.02 × 55.12 - Step 4: Simplify right side
66.02x = 5,017.02 - Step 5: Solve for x
x = 5,017.02/66.02 - Step 6: Final answer
x = 75.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.