Finding the Fourth Proportional to 124.11, 171.26 and 74.99
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Solution
The fourth proportional to 124.11, 171.26 and 74.99 is: 103.48
Step by Step Solution
- Step 1: Write the proportion equation
124.11 : 171.26 = 74.99 : x - Step 2: Convert to fraction form
124.11/171.26 = 74.99/x - Step 3: Cross multiply
124.11x = 171.26 × 74.99 - Step 4: Simplify right side
124.11x = 12,842.79 - Step 5: Solve for x
x = 12,842.79/124.11 - Step 6: Final answer
x = 103.48
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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.