Finding the Fourth Proportional to 102,143.84, 140,957.62 and 56,820.99
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Solution
The fourth proportional to 102,143.84, 140,957.62 and 56,820.99 is: 78,412.48
Step by Step Solution
- Step 1: Write the proportion equation
102,143.84 : 140,957.62 = 56,820.99 : x - Step 2: Convert to fraction form
102,143.84/140,957.62 = 56,820.99/x - Step 3: Cross multiply
102,143.84x = 140,957.62 × 56,820.99 - Step 4: Simplify right side
102,143.84x = 8,009,351,902.98 - Step 5: Solve for x
x = 8,009,351,902.98/102,143.84 - Step 6: Final answer
x = 78,412.48
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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.