Finding the Fourth Proportional to 86,629.21, 129,989.35 and 61,490.95
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Solution
The fourth proportional to 86,629.21, 129,989.35 and 61,490.95 is: 92,268.75
Step by Step Solution
- Step 1: Write the proportion equation
86,629.21 : 129,989.35 = 61,490.95 : x - Step 2: Convert to fraction form
86,629.21/129,989.35 = 61,490.95/x - Step 3: Cross multiply
86,629.21x = 129,989.35 × 61,490.95 - Step 4: Simplify right side
86,629.21x = 7,993,168,621.38 - Step 5: Solve for x
x = 7,993,168,621.38/86,629.21 - Step 6: Final answer
x = 92,268.75
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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.