Finding the Fourth Proportional to 115,871.92, 159,975.48 and 79,635.76
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Solution
The fourth proportional to 115,871.92, 159,975.48 and 79,635.76 is: 109,946.99
Step by Step Solution
- Step 1: Write the proportion equation
115,871.92 : 159,975.48 = 79,635.76 : x - Step 2: Convert to fraction form
115,871.92/159,975.48 = 79,635.76/x - Step 3: Cross multiply
115,871.92x = 159,975.48 × 79,635.76 - Step 4: Simplify right side
115,871.92x = 12,739,768,931.16 - Step 5: Solve for x
x = 12,739,768,931.16/115,871.92 - Step 6: Final answer
x = 109,946.99
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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.