Finding the Fourth Proportional to 91,356.16, 136,959.68 and 40,718.08
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Solution
The fourth proportional to 91,356.16, 136,959.68 and 40,718.08 is: 61,043.89
Step by Step Solution
- Step 1: Write the proportion equation
91,356.16 : 136,959.68 = 40,718.08 : x - Step 2: Convert to fraction form
91,356.16/136,959.68 = 40,718.08/x - Step 3: Cross multiply
91,356.16x = 136,959.68 × 40,718.08 - Step 4: Simplify right side
91,356.16x = 5,576,735,207.01 - Step 5: Solve for x
x = 5,576,735,207.01/91,356.16 - Step 6: Final answer
x = 61,043.89
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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.