Finding the Fourth Proportional to 79,431.23, 109,657.66 and 61,242.23
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Solution
The fourth proportional to 79,431.23, 109,657.66 and 61,242.23 is: 84,547.09
Step by Step Solution
- Step 1: Write the proportion equation
79,431.23 : 109,657.66 = 61,242.23 : x - Step 2: Convert to fraction form
79,431.23/109,657.66 = 61,242.23/x - Step 3: Cross multiply
79,431.23x = 109,657.66 × 61,242.23 - Step 4: Simplify right side
79,431.23x = 6,715,679,340.15 - Step 5: Solve for x
x = 6,715,679,340.15/79,431.23 - Step 6: Final answer
x = 84,547.09
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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.