Finding the Fourth Proportional to 77,473.16, 106,975.98 and 63,135.09
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Solution
The fourth proportional to 77,473.16, 106,975.98 and 63,135.09 is: 87,177.78
Step by Step Solution
- Step 1: Write the proportion equation
77,473.16 : 106,975.98 = 63,135.09 : x - Step 2: Convert to fraction form
77,473.16/106,975.98 = 63,135.09/x - Step 3: Cross multiply
77,473.16x = 106,975.98 × 63,135.09 - Step 4: Simplify right side
77,473.16x = 6,753,937,809.46 - Step 5: Solve for x
x = 6,753,937,809.46/77,473.16 - Step 6: Final answer
x = 87,177.78
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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.