Finding the Fourth Proportional to 77,946.09, 107,564.93 and 42,135.79
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Solution
The fourth proportional to 77,946.09, 107,564.93 and 42,135.79 is: 58,147.02
Step by Step Solution
- Step 1: Write the proportion equation
77,946.09 : 107,564.93 = 42,135.79 : x - Step 2: Convert to fraction form
77,946.09/107,564.93 = 42,135.79/x - Step 3: Cross multiply
77,946.09x = 107,564.93 × 42,135.79 - Step 4: Simplify right side
77,946.09x = 4,532,332,764.02 - Step 5: Solve for x
x = 4,532,332,764.02/77,946.09 - Step 6: Final answer
x = 58,147.02
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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.