Finding the Fourth Proportional to 86,990.14, 130,489.26 and 39,585.70
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Solution
The fourth proportional to 86,990.14, 130,489.26 and 39,585.70 is: 59,380.39
Step by Step Solution
- Step 1: Write the proportion equation
86,990.14 : 130,489.26 = 39,585.70 : x - Step 2: Convert to fraction form
86,990.14/130,489.26 = 39,585.70/x - Step 3: Cross multiply
86,990.14x = 130,489.26 × 39,585.70 - Step 4: Simplify right side
86,990.14x = 5,165,508,699.58 - Step 5: Solve for x
x = 5,165,508,699.58/86,990.14 - Step 6: Final answer
x = 59,380.39
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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.