Finding the Fourth Proportional to 81,372.36, 121,342.53 and 74,909.64
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Solution
The fourth proportional to 81,372.36, 121,342.53 and 74,909.64 is: 111,705.32
Step by Step Solution
- Step 1: Write the proportion equation
81,372.36 : 121,342.53 = 74,909.64 : x - Step 2: Convert to fraction form
81,372.36/121,342.53 = 74,909.64/x - Step 3: Cross multiply
81,372.36x = 121,342.53 × 74,909.64 - Step 4: Simplify right side
81,372.36x = 9,089,725,238.99 - Step 5: Solve for x
x = 9,089,725,238.99/81,372.36 - Step 6: Final answer
x = 111,705.32
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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.