Finding the Fourth Proportional to 143,930.93, 198,621.86 and 83,507.09
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Solution
The fourth proportional to 143,930.93, 198,621.86 and 83,507.09 is: 115,238.14
Step by Step Solution
- Step 1: Write the proportion equation
143,930.93 : 198,621.86 = 83,507.09 : x - Step 2: Convert to fraction form
143,930.93/198,621.86 = 83,507.09/x - Step 3: Cross multiply
143,930.93x = 198,621.86 × 83,507.09 - Step 4: Simplify right side
143,930.93x = 16,586,332,128.34 - Step 5: Solve for x
x = 16,586,332,128.34/143,930.93 - Step 6: Final answer
x = 115,238.14
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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.