Finding the Fourth Proportional to 90,689.28, 135,774.72 and 69,953.28
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Solution
The fourth proportional to 90,689.28, 135,774.72 and 69,953.28 is: 104,729.99
Step by Step Solution
- Step 1: Write the proportion equation
90,689.28 : 135,774.72 = 69,953.28 : x - Step 2: Convert to fraction form
90,689.28/135,774.72 = 69,953.28/x - Step 3: Cross multiply
90,689.28x = 135,774.72 × 69,953.28 - Step 4: Simplify right side
90,689.28x = 9,497,887,005.08 - Step 5: Solve for x
x = 9,497,887,005.08/90,689.28 - Step 6: Final answer
x = 104,729.99
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1.5x scale
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.