Finding the Fourth Proportional to 128,927.75, 177,923.36 and 72,343.31
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Solution
The fourth proportional to 128,927.75, 177,923.36 and 72,343.31 is: 99,835.49
Step by Step Solution
- Step 1: Write the proportion equation
128,927.75 : 177,923.36 = 72,343.31 : x - Step 2: Convert to fraction form
128,927.75/177,923.36 = 72,343.31/x - Step 3: Cross multiply
128,927.75x = 177,923.36 × 72,343.31 - Step 4: Simplify right side
128,927.75x = 12,871,564,788.72 - Step 5: Solve for x
x = 12,871,564,788.72/128,927.75 - Step 6: Final answer
x = 99,835.49
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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.