Finding the Fourth Proportional to 81,376.60, 121,454.80 and 76,062.19
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Solution
The fourth proportional to 81,376.60, 121,454.80 and 76,062.19 is: 113,523.03
Step by Step Solution
- Step 1: Write the proportion equation
81,376.60 : 121,454.80 = 76,062.19 : x - Step 2: Convert to fraction form
81,376.60/121,454.80 = 76,062.19/x - Step 3: Cross multiply
81,376.60x = 121,454.80 × 76,062.19 - Step 4: Simplify right side
81,376.60x = 9,238,118,074.01 - Step 5: Solve for x
x = 9,238,118,074.01/81,376.60 - Step 6: Final answer
x = 113,523.03
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.