Finding the Fourth Proportional to 128,316.46, 177,082.86 and 70,954.78
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Solution
The fourth proportional to 128,316.46, 177,082.86 and 70,954.78 is: 97,920.99
Step by Step Solution
- Step 1: Write the proportion equation
128,316.46 : 177,082.86 = 70,954.78 : x - Step 2: Convert to fraction form
128,316.46/177,082.86 = 70,954.78/x - Step 3: Cross multiply
128,316.46x = 177,082.86 × 70,954.78 - Step 4: Simplify right side
128,316.46x = 12,564,875,373.07 - Step 5: Solve for x
x = 12,564,875,373.07/128,316.46 - Step 6: Final answer
x = 97,920.99
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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.