Finding the Fourth Proportional to 128,440.42, 177,248.28 and 71,851.84
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Solution
The fourth proportional to 128,440.42, 177,248.28 and 71,851.84 is: 99,155.82
Step by Step Solution
- Step 1: Write the proportion equation
128,440.42 : 177,248.28 = 71,851.84 : x - Step 2: Convert to fraction form
128,440.42/177,248.28 = 71,851.84/x - Step 3: Cross multiply
128,440.42x = 177,248.28 × 71,851.84 - Step 4: Simplify right side
128,440.42x = 12,735,615,054.84 - Step 5: Solve for x
x = 12,735,615,054.84/128,440.42 - Step 6: Final answer
x = 99,155.82
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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.