Finding the Fourth Proportional to 86,737.80, 129,985.20 and 68,998.80
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Solution
The fourth proportional to 86,737.80, 129,985.20 and 68,998.80 is: 103,401.55
Step by Step Solution
- Step 1: Write the proportion equation
86,737.80 : 129,985.20 = 68,998.80 : x - Step 2: Convert to fraction form
86,737.80/129,985.20 = 68,998.80/x - Step 3: Cross multiply
86,737.80x = 129,985.20 × 68,998.80 - Step 4: Simplify right side
86,737.80x = 8,968,822,817.76 - Step 5: Solve for x
x = 8,968,822,817.76/86,737.80 - Step 6: Final answer
x = 103,401.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.