Finding the Fourth Proportional to 135,915.84, 187,565.04 and 79,316.16
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Solution
The fourth proportional to 135,915.84, 187,565.04 and 79,316.16 is: 109,456.99
Step by Step Solution
- Step 1: Write the proportion equation
135,915.84 : 187,565.04 = 79,316.16 : x - Step 2: Convert to fraction form
135,915.84/187,565.04 = 79,316.16/x - Step 3: Cross multiply
135,915.84x = 187,565.04 × 79,316.16 - Step 4: Simplify right side
135,915.84x = 14,876,938,723.05 - Step 5: Solve for x
x = 14,876,938,723.05/135,915.84 - Step 6: Final answer
x = 109,456.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.