Finding the Fourth Proportional to 115,381.80, 159,169.86 and 99,438.84
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Solution
The fourth proportional to 115,381.80, 159,169.86 and 99,438.84 is: 137,176.45
Step by Step Solution
- Step 1: Write the proportion equation
115,381.80 : 159,169.86 = 99,438.84 : x - Step 2: Convert to fraction form
115,381.80/159,169.86 = 99,438.84/x - Step 3: Cross multiply
115,381.80x = 159,169.86 × 99,438.84 - Step 4: Simplify right side
115,381.80x = 15,827,666,241.36 - Step 5: Solve for x
x = 15,827,666,241.36/115,381.80 - Step 6: Final answer
x = 137,176.45
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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.