Finding the Fourth Proportional to 76,690.44, 105,832.58 and 42,698.05
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Solution
The fourth proportional to 76,690.44, 105,832.58 and 42,698.05 is: 58,923.18
Step by Step Solution
- Step 1: Write the proportion equation
76,690.44 : 105,832.58 = 42,698.05 : x - Step 2: Convert to fraction form
76,690.44/105,832.58 = 42,698.05/x - Step 3: Cross multiply
76,690.44x = 105,832.58 × 42,698.05 - Step 4: Simplify right side
76,690.44x = 4,518,844,314.40 - Step 5: Solve for x
x = 4,518,844,314.40/76,690.44 - Step 6: Final answer
x = 58,923.18
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1.5x scale
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.