Finding the Fourth Proportional to 128,423.24, 177,221.46 and 71,835.08
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Solution
The fourth proportional to 128,423.24, 177,221.46 and 71,835.08 is: 99,130.95
Step by Step Solution
- Step 1: Write the proportion equation
128,423.24 : 177,221.46 = 71,835.08 : x - Step 2: Convert to fraction form
128,423.24/177,221.46 = 71,835.08/x - Step 3: Cross multiply
128,423.24x = 177,221.46 × 71,835.08 - Step 4: Simplify right side
128,423.24x = 12,730,717,756.82 - Step 5: Solve for x
x = 12,730,717,756.82/128,423.24 - Step 6: Final answer
x = 99,130.95
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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.