Finding the Fourth Proportional to 128,931.12, 193,317.28 and 44,671.68
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Solution
The fourth proportional to 128,931.12, 193,317.28 and 44,671.68 is: 66,980.01
Step by Step Solution
- Step 1: Write the proportion equation
128,931.12 : 193,317.28 = 44,671.68 : x - Step 2: Convert to fraction form
128,931.12/193,317.28 = 44,671.68/x - Step 3: Cross multiply
128,931.12x = 193,317.28 × 44,671.68 - Step 4: Simplify right side
128,931.12x = 8,635,807,670.63 - Step 5: Solve for x
x = 8,635,807,670.63/128,931.12 - Step 6: Final answer
x = 66,980.01
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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.