Finding the Fourth Proportional to 128,432.00, 177,271.79 and 74,727.41
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Solution
The fourth proportional to 128,432.00, 177,271.79 and 74,727.41 is: 103,144.55
Step by Step Solution
- Step 1: Write the proportion equation
128,432.00 : 177,271.79 = 74,727.41 : x - Step 2: Convert to fraction form
128,432.00/177,271.79 = 74,727.41/x - Step 3: Cross multiply
128,432.00x = 177,271.79 × 74,727.41 - Step 4: Simplify right side
128,432.00x = 13,247,060,472.77 - Step 5: Solve for x
x = 13,247,060,472.77/128,432.00 - Step 6: Final answer
x = 103,144.55
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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.