Finding the Fourth Proportional to 128,337.72, 177,106.44 and 71,749.08
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Solution
The fourth proportional to 128,337.72, 177,106.44 and 71,749.08 is: 99,013.95
Step by Step Solution
- Step 1: Write the proportion equation
128,337.72 : 177,106.44 = 71,749.08 : x - Step 2: Convert to fraction form
128,337.72/177,106.44 = 71,749.08/x - Step 3: Cross multiply
128,337.72x = 177,106.44 × 71,749.08 - Step 4: Simplify right side
128,337.72x = 12,707,224,132.08 - Step 5: Solve for x
x = 12,707,224,132.08/128,337.72 - Step 6: Final answer
x = 99,013.95
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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.