Finding the Fourth Proportional to 107.18, 147.86 and 72.23
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Solution
The fourth proportional to 107.18, 147.86 and 72.23 is: 99.65
Step by Step Solution
- Step 1: Write the proportion equation
107.18 : 147.86 = 72.23 : x - Step 2: Convert to fraction form
107.18/147.86 = 72.23/x - Step 3: Cross multiply
107.18x = 147.86 × 72.23 - Step 4: Simplify right side
107.18x = 10,680.75 - Step 5: Solve for x
x = 10,680.75/107.18 - Step 6: Final answer
x = 99.65
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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.