Finding the Fourth Proportional to 86,621.80, 121,503.80 and 86,621.80
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Solution
The fourth proportional to 86,621.80, 121,503.80 and 86,621.80 is: 121,503.80
Step by Step Solution
- Step 1: Write the proportion equation
86,621.80 : 121,503.80 = 86,621.80 : x - Step 2: Convert to fraction form
86,621.80/121,503.80 = 86,621.80/x - Step 3: Cross multiply
86,621.80x = 121,503.80 × 86,621.80 - Step 4: Simplify right side
86,621.80x = 10,524,877,862.84 - Step 5: Solve for x
x = 10,524,877,862.84/86,621.80 - Step 6: Final answer
x = 121,503.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.