Finding the Fourth Proportional to 129.95, 179.28 and 74.68
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Solution
The fourth proportional to 129.95, 179.28 and 74.68 is: 103.02
Step by Step Solution
- Step 1: Write the proportion equation
129.95 : 179.28 = 74.68 : x - Step 2: Convert to fraction form
129.95/179.28 = 74.68/x - Step 3: Cross multiply
129.95x = 179.28 × 74.68 - Step 4: Simplify right side
129.95x = 13,387.73 - Step 5: Solve for x
x = 13,387.73/129.95 - Step 6: Final answer
x = 103.02
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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.