Finding the Fourth Proportional to 86,842.10, 130,283.62 and 69,139.68
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Solution
The fourth proportional to 86,842.10, 130,283.62 and 69,139.68 is: 103,725.82
Step by Step Solution
- Step 1: Write the proportion equation
86,842.10 : 130,283.62 = 69,139.68 : x - Step 2: Convert to fraction form
86,842.10/130,283.62 = 69,139.68/x - Step 3: Cross multiply
86,842.10x = 130,283.62 × 69,139.68 - Step 4: Simplify right side
86,842.10x = 9,007,767,796.04 - Step 5: Solve for x
x = 9,007,767,796.04/86,842.10 - Step 6: Final answer
x = 103,725.82
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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.