Finding the Fourth Proportional to 86,420.53, 129,528.90 and 38,980.09
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Solution
The fourth proportional to 86,420.53, 129,528.90 and 38,980.09 is: 58,424.18
Step by Step Solution
- Step 1: Write the proportion equation
86,420.53 : 129,528.90 = 38,980.09 : x - Step 2: Convert to fraction form
86,420.53/129,528.90 = 38,980.09/x - Step 3: Cross multiply
86,420.53x = 129,528.90 × 38,980.09 - Step 4: Simplify right side
86,420.53x = 5,049,048,179.60 - Step 5: Solve for x
x = 5,049,048,179.60/86,420.53 - Step 6: Final answer
x = 58,424.18
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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.