Finding the Fourth Proportional to 83,777.90, 115,618.79 and 47,979.74
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Solution
The fourth proportional to 83,777.90, 115,618.79 and 47,979.74 is: 66,215.08
Step by Step Solution
- Step 1: Write the proportion equation
83,777.90 : 115,618.79 = 47,979.74 : x - Step 2: Convert to fraction form
83,777.90/115,618.79 = 47,979.74/x - Step 3: Cross multiply
83,777.90x = 115,618.79 × 47,979.74 - Step 4: Simplify right side
83,777.90x = 5,547,359,892.31 - Step 5: Solve for x
x = 5,547,359,892.31/83,777.90 - Step 6: Final answer
x = 66,215.08
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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.