Finding the Fourth Proportional to 81,268.74, 121,908.59 and 31,349.25
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Solution
The fourth proportional to 81,268.74, 121,908.59 and 31,349.25 is: 47,025.99
Step by Step Solution
- Step 1: Write the proportion equation
81,268.74 : 121,908.59 = 31,349.25 : x - Step 2: Convert to fraction form
81,268.74/121,908.59 = 31,349.25/x - Step 3: Cross multiply
81,268.74x = 121,908.59 × 31,349.25 - Step 4: Simplify right side
81,268.74x = 3,821,742,708.31 - Step 5: Solve for x
x = 3,821,742,708.31/81,268.74 - Step 6: Final answer
x = 47,025.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.