Finding the Fourth Proportional to 98,609.04, 135,914.76 and 74,728.08
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Solution
The fourth proportional to 98,609.04, 135,914.76 and 74,728.08 is: 102,999.17
Step by Step Solution
- Step 1: Write the proportion equation
98,609.04 : 135,914.76 = 74,728.08 : x - Step 2: Convert to fraction form
98,609.04/135,914.76 = 74,728.08/x - Step 3: Cross multiply
98,609.04x = 135,914.76 × 74,728.08 - Step 4: Simplify right side
98,609.04x = 10,156,649,058.46 - Step 5: Solve for x
x = 10,156,649,058.46/98,609.04 - Step 6: Final answer
x = 102,999.17
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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.