Finding the Fourth Proportional to 135,430.09, 186,893.16 and 78,069.09
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Solution
The fourth proportional to 135,430.09, 186,893.16 and 78,069.09 is: 107,735.14
Step by Step Solution
- Step 1: Write the proportion equation
135,430.09 : 186,893.16 = 78,069.09 : x - Step 2: Convert to fraction form
135,430.09/186,893.16 = 78,069.09/x - Step 3: Cross multiply
135,430.09x = 186,893.16 × 78,069.09 - Step 4: Simplify right side
135,430.09x = 14,590,579,140.23 - Step 5: Solve for x
x = 14,590,579,140.23/135,430.09 - Step 6: Final answer
x = 107,735.14
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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.