Finding the Fourth Proportional to 128,257.41, 176,994.95 and 71,668.79
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Solution
The fourth proportional to 128,257.41, 176,994.95 and 71,668.79 is: 98,902.77
Step by Step Solution
- Step 1: Write the proportion equation
128,257.41 : 176,994.95 = 71,668.79 : x - Step 2: Convert to fraction form
128,257.41/176,994.95 = 71,668.79/x - Step 3: Cross multiply
128,257.41x = 176,994.95 × 71,668.79 - Step 4: Simplify right side
128,257.41x = 12,685,012,659.29 - Step 5: Solve for x
x = 12,685,012,659.29/128,257.41 - Step 6: Final answer
x = 98,902.77
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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.