Finding the Fourth Proportional to 98,561.18, 135,980.70 and 56,109.08
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Solution
The fourth proportional to 98,561.18, 135,980.70 and 56,109.08 is: 77,411.33
Step by Step Solution
- Step 1: Write the proportion equation
98,561.18 : 135,980.70 = 56,109.08 : x - Step 2: Convert to fraction form
98,561.18/135,980.70 = 56,109.08/x - Step 3: Cross multiply
98,561.18x = 135,980.70 × 56,109.08 - Step 4: Simplify right side
98,561.18x = 7,629,751,974.76 - Step 5: Solve for x
x = 7,629,751,974.76/98,561.18 - Step 6: Final answer
x = 77,411.33
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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.