Finding the Fourth Proportional to 78,090.53, 117,134.75 and 18,926.70
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Solution
The fourth proportional to 78,090.53, 117,134.75 and 18,926.70 is: 28,389.80
Step by Step Solution
- Step 1: Write the proportion equation
78,090.53 : 117,134.75 = 18,926.70 : x - Step 2: Convert to fraction form
78,090.53/117,134.75 = 18,926.70/x - Step 3: Cross multiply
78,090.53x = 117,134.75 × 18,926.70 - Step 4: Simplify right side
78,090.53x = 2,216,974,178.19 - Step 5: Solve for x
x = 2,216,974,178.19/78,090.53 - Step 6: Final answer
x = 28,389.80
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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.