Finding the Fourth Proportional to 128,343.66, 177,108.40 and 70,983.50
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Solution
The fourth proportional to 128,343.66, 177,108.40 and 70,983.50 is: 97,953.99
Step by Step Solution
- Step 1: Write the proportion equation
128,343.66 : 177,108.40 = 70,983.50 : x - Step 2: Convert to fraction form
128,343.66/177,108.40 = 70,983.50/x - Step 3: Cross multiply
128,343.66x = 177,108.40 × 70,983.50 - Step 4: Simplify right side
128,343.66x = 12,571,774,111.40 - Step 5: Solve for x
x = 12,571,774,111.40/128,343.66 - Step 6: Final answer
x = 97,953.99
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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.