Finding the Fourth Proportional to 90,795.62, 136,021.70 and 51,381.02
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Solution
The fourth proportional to 90,795.62, 136,021.70 and 51,381.02 is: 76,974.35
Step by Step Solution
- Step 1: Write the proportion equation
90,795.62 : 136,021.70 = 51,381.02 : x - Step 2: Convert to fraction form
90,795.62/136,021.70 = 51,381.02/x - Step 3: Cross multiply
90,795.62x = 136,021.70 × 51,381.02 - Step 4: Simplify right side
90,795.62x = 6,988,933,688.13 - Step 5: Solve for x
x = 6,988,933,688.13/90,795.62 - Step 6: Final answer
x = 76,974.35
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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.