Finding the Fourth Proportional to 128,867.19, 177,837.67 and 71,506.74
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Solution
The fourth proportional to 128,867.19, 177,837.67 and 71,506.74 is: 98,679.83
Step by Step Solution
- Step 1: Write the proportion equation
128,867.19 : 177,837.67 = 71,506.74 : x - Step 2: Convert to fraction form
128,867.19/177,837.67 = 71,506.74/x - Step 3: Cross multiply
128,867.19x = 177,837.67 × 71,506.74 - Step 4: Simplify right side
128,867.19x = 12,716,592,030.90 - Step 5: Solve for x
x = 12,716,592,030.90/128,867.19 - Step 6: Final answer
x = 98,679.83
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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.