Finding the Fourth Proportional to 103,931.30, 155,507.70 and 74,014.70
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Solution
The fourth proportional to 103,931.30, 155,507.70 and 74,014.70 is: 110,744.85
Step by Step Solution
- Step 1: Write the proportion equation
103,931.30 : 155,507.70 = 74,014.70 : x - Step 2: Convert to fraction form
103,931.30/155,507.70 = 74,014.70/x - Step 3: Cross multiply
103,931.30x = 155,507.70 × 74,014.70 - Step 4: Simplify right side
103,931.30x = 11,509,855,763.19 - Step 5: Solve for x
x = 11,509,855,763.19/103,931.30 - Step 6: Final answer
x = 110,744.85
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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.