Finding the Fourth Proportional to 90,836.63, 136,259.80 and 28,511.99
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Solution
The fourth proportional to 90,836.63, 136,259.80 and 28,511.99 is: 42,769.50
Step by Step Solution
- Step 1: Write the proportion equation
90,836.63 : 136,259.80 = 28,511.99 : x - Step 2: Convert to fraction form
90,836.63/136,259.80 = 28,511.99/x - Step 3: Cross multiply
90,836.63x = 136,259.80 × 28,511.99 - Step 4: Simplify right side
90,836.63x = 3,885,037,373.70 - Step 5: Solve for x
x = 3,885,037,373.70/90,836.63 - Step 6: Final answer
x = 42,769.50
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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.