Finding the Fourth Proportional to 98,658.12, 135,962.21 and 71,388.06
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Solution
The fourth proportional to 98,658.12, 135,962.21 and 71,388.06 is: 98,380.94
Step by Step Solution
- Step 1: Write the proportion equation
98,658.12 : 135,962.21 = 71,388.06 : x - Step 2: Convert to fraction form
98,658.12/135,962.21 = 71,388.06/x - Step 3: Cross multiply
98,658.12x = 135,962.21 × 71,388.06 - Step 4: Simplify right side
98,658.12x = 9,706,078,405.21 - Step 5: Solve for x
x = 9,706,078,405.21/98,658.12 - Step 6: Final answer
x = 98,380.94
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1.5x scale
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.