Finding the Fourth Proportional to 105,423.20, 158,134.80 and 69,993.80
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Solution
The fourth proportional to 105,423.20, 158,134.80 and 69,993.80 is: 104,990.70
Step by Step Solution
- Step 1: Write the proportion equation
105,423.20 : 158,134.80 = 69,993.80 : x - Step 2: Convert to fraction form
105,423.20/158,134.80 = 69,993.80/x - Step 3: Cross multiply
105,423.20x = 158,134.80 × 69,993.80 - Step 4: Simplify right side
105,423.20x = 11,068,455,564.24 - Step 5: Solve for x
x = 11,068,455,564.24/105,423.20 - Step 6: Final answer
x = 104,990.70
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1.5x scale
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.