Finding the Fourth Proportional to 128,926.84, 177,926.88 and 85,831.96
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Solution
The fourth proportional to 128,926.84, 177,926.88 and 85,831.96 is: 118,453.32
Step by Step Solution
- Step 1: Write the proportion equation
128,926.84 : 177,926.88 = 85,831.96 : x - Step 2: Convert to fraction form
128,926.84/177,926.88 = 85,831.96/x - Step 3: Cross multiply
128,926.84x = 177,926.88 × 85,831.96 - Step 4: Simplify right side
128,926.84x = 15,271,812,847.08 - Step 5: Solve for x
x = 15,271,812,847.08/128,926.84 - Step 6: Final answer
x = 118,453.32
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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.