Finding the Fourth Proportional to 90,603.70, 135,905.55 and 53,181.70
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Solution
The fourth proportional to 90,603.70, 135,905.55 and 53,181.70 is: 79,772.55
Step by Step Solution
- Step 1: Write the proportion equation
90,603.70 : 135,905.55 = 53,181.70 : x - Step 2: Convert to fraction form
90,603.70/135,905.55 = 53,181.70/x - Step 3: Cross multiply
90,603.70x = 135,905.55 × 53,181.70 - Step 4: Simplify right side
90,603.70x = 7,227,688,188.44 - Step 5: Solve for x
x = 7,227,688,188.44/90,603.70 - Step 6: Final answer
x = 79,772.55
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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.