Finding the Fourth Proportional to 115,918.30, 159,973.26 and 64,928.05
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Solution
The fourth proportional to 115,918.30, 159,973.26 and 64,928.05 is: 89,604.07
Step by Step Solution
- Step 1: Write the proportion equation
115,918.30 : 159,973.26 = 64,928.05 : x - Step 2: Convert to fraction form
115,918.30/159,973.26 = 64,928.05/x - Step 3: Cross multiply
115,918.30x = 159,973.26 × 64,928.05 - Step 4: Simplify right side
115,918.30x = 10,386,751,823.94 - Step 5: Solve for x
x = 10,386,751,823.94/115,918.30 - Step 6: Final answer
x = 89,604.07
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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.