Finding the Fourth Proportional to 128,862.73, 177,839.45 and 72,277.75
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Solution
The fourth proportional to 128,862.73, 177,839.45 and 72,277.75 is: 99,748.28
Step by Step Solution
- Step 1: Write the proportion equation
128,862.73 : 177,839.45 = 72,277.75 : x - Step 2: Convert to fraction form
128,862.73/177,839.45 = 72,277.75/x - Step 3: Cross multiply
128,862.73x = 177,839.45 × 72,277.75 - Step 4: Simplify right side
128,862.73x = 12,853,835,307.24 - Step 5: Solve for x
x = 12,853,835,307.24/128,862.73 - Step 6: Final answer
x = 99,748.28
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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.