Finding the Fourth Proportional to 85.38, 127.52 and 69.99
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Solution
The fourth proportional to 85.38, 127.52 and 69.99 is: 104.53
Step by Step Solution
- Step 1: Write the proportion equation
85.38 : 127.52 = 69.99 : x - Step 2: Convert to fraction form
85.38/127.52 = 69.99/x - Step 3: Cross multiply
85.38x = 127.52 × 69.99 - Step 4: Simplify right side
85.38x = 8,925.12 - Step 5: Solve for x
x = 8,925.12/85.38 - Step 6: Final answer
x = 104.53
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.