Finding the Fourth Proportional to 61.68, 85.15 and 40.99
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Solution
The fourth proportional to 61.68, 85.15 and 40.99 is: 56.59
Step by Step Solution
- Step 1: Write the proportion equation
61.68 : 85.15 = 40.99 : x - Step 2: Convert to fraction form
61.68/85.15 = 40.99/x - Step 3: Cross multiply
61.68x = 85.15 × 40.99 - Step 4: Simplify right side
61.68x = 3,490.54 - Step 5: Solve for x
x = 3,490.54/61.68 - Step 6: Final answer
x = 56.59
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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.