Finding the Fourth Proportional to 79,654.80, 109,921.50 and 43,356.99
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Solution
The fourth proportional to 79,654.80, 109,921.50 and 43,356.99 is: 59,831.49
Step by Step Solution
- Step 1: Write the proportion equation
79,654.80 : 109,921.50 = 43,356.99 : x - Step 2: Convert to fraction form
79,654.80/109,921.50 = 43,356.99/x - Step 3: Cross multiply
79,654.80x = 109,921.50 × 43,356.99 - Step 4: Simplify right side
79,654.80x = 4,765,865,376.29 - Step 5: Solve for x
x = 4,765,865,376.29/79,654.80 - Step 6: Final answer
x = 59,831.49
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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.