Finding the Fourth Proportional to 70,918.12, 106,311.57 and 39,731.50
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Solution
The fourth proportional to 70,918.12, 106,311.57 and 39,731.50 is: 59,560.49
Step by Step Solution
- Step 1: Write the proportion equation
70,918.12 : 106,311.57 = 39,731.50 : x - Step 2: Convert to fraction form
70,918.12/106,311.57 = 39,731.50/x - Step 3: Cross multiply
70,918.12x = 106,311.57 × 39,731.50 - Step 4: Simplify right side
70,918.12x = 4,223,918,143.46 - Step 5: Solve for x
x = 4,223,918,143.46/70,918.12 - Step 6: Final answer
x = 59,560.49
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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.