Finding the Fourth Proportional to 100.88, 139.36 and 88.08
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Solution
The fourth proportional to 100.88, 139.36 and 88.08 is: 121.68
Step by Step Solution
- Step 1: Write the proportion equation
100.88 : 139.36 = 88.08 : x - Step 2: Convert to fraction form
100.88/139.36 = 88.08/x - Step 3: Cross multiply
100.88x = 139.36 × 88.08 - Step 4: Simplify right side
100.88x = 12,274.83 - Step 5: Solve for x
x = 12,274.83/100.88 - Step 6: Final answer
x = 121.68
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.