Finding the Fourth Proportional to 81,392.60, 121,943.10 and 69,728.60
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Solution
The fourth proportional to 81,392.60, 121,943.10 and 69,728.60 is: 104,467.99
Step by Step Solution
- Step 1: Write the proportion equation
81,392.60 : 121,943.10 = 69,728.60 : x - Step 2: Convert to fraction form
81,392.60/121,943.10 = 69,728.60/x - Step 3: Cross multiply
81,392.60x = 121,943.10 × 69,728.60 - Step 4: Simplify right side
81,392.60x = 8,502,921,642.66 - Step 5: Solve for x
x = 8,502,921,642.66/81,392.60 - Step 6: Final answer
x = 104,467.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.