Finding the Fourth Proportional to 128,526.31, 177,366.27 and 71,937.69
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Solution
The fourth proportional to 128,526.31, 177,366.27 and 71,937.69 is: 99,273.99
Step by Step Solution
- Step 1: Write the proportion equation
128,526.31 : 177,366.27 = 71,937.69 : x - Step 2: Convert to fraction form
128,526.31/177,366.27 = 71,937.69/x - Step 3: Cross multiply
128,526.31x = 177,366.27 × 71,937.69 - Step 4: Simplify right side
128,526.31x = 12,759,319,747.72 - Step 5: Solve for x
x = 12,759,319,747.72/128,526.31 - Step 6: Final answer
x = 99,273.99
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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.