Finding the Fourth Proportional to 157,909.36, 217,905.74 and 86,289.97
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Solution
The fourth proportional to 157,909.36, 217,905.74 and 86,289.97 is: 119,075.14
Step by Step Solution
- Step 1: Write the proportion equation
157,909.36 : 217,905.74 = 86,289.97 : x - Step 2: Convert to fraction form
157,909.36/217,905.74 = 86,289.97/x - Step 3: Cross multiply
157,909.36x = 217,905.74 × 86,289.97 - Step 4: Simplify right side
157,909.36x = 18,803,079,335.98 - Step 5: Solve for x
x = 18,803,079,335.98/157,909.36 - Step 6: Final answer
x = 119,075.14
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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.