Finding the Fourth Proportional to 88.18, 121.65 and 61.99
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Solution
The fourth proportional to 88.18, 121.65 and 61.99 is: 85.52
Step by Step Solution
- Step 1: Write the proportion equation
88.18 : 121.65 = 61.99 : x - Step 2: Convert to fraction form
88.18/121.65 = 61.99/x - Step 3: Cross multiply
88.18x = 121.65 × 61.99 - Step 4: Simplify right side
88.18x = 7,541.24 - Step 5: Solve for x
x = 7,541.24/88.18 - Step 6: Final answer
x = 85.52
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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.