Finding the Fourth Proportional to 97.96, 135.21 and 61.09
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Solution
The fourth proportional to 97.96, 135.21 and 61.09 is: 84.32
Step by Step Solution
- Step 1: Write the proportion equation
97.96 : 135.21 = 61.09 : x - Step 2: Convert to fraction form
97.96/135.21 = 61.09/x - Step 3: Cross multiply
97.96x = 135.21 × 61.09 - Step 4: Simplify right side
97.96x = 8,259.67 - Step 5: Solve for x
x = 8,259.67/97.96 - Step 6: Final answer
x = 84.32
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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.