Finding the Fourth Proportional to 90.05, 124.17 and 57.29
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Solution
The fourth proportional to 90.05, 124.17 and 57.29 is: 78.99
Step by Step Solution
- Step 1: Write the proportion equation
90.05 : 124.17 = 57.29 : x - Step 2: Convert to fraction form
90.05/124.17 = 57.29/x - Step 3: Cross multiply
90.05x = 124.17 × 57.29 - Step 4: Simplify right side
90.05x = 7,113.08 - Step 5: Solve for x
x = 7,113.08/90.05 - Step 6: Final answer
x = 78.99
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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.