Finding the Fourth Proportional to 157,955.09, 217,977.50 and 86,335.07
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Solution
The fourth proportional to 157,955.09, 217,977.50 and 86,335.07 is: 119,142.11
Step by Step Solution
- Step 1: Write the proportion equation
157,955.09 : 217,977.50 = 86,335.07 : x - Step 2: Convert to fraction form
157,955.09/217,977.50 = 86,335.07/x - Step 3: Cross multiply
157,955.09x = 217,977.50 × 86,335.07 - Step 4: Simplify right side
157,955.09x = 18,819,102,289.25 - Step 5: Solve for x
x = 18,819,102,289.25/157,955.09 - Step 6: Final answer
x = 119,142.11
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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.