Finding the Fourth Proportional to 87,039.96, 129,970.55 and 69,068.79
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Solution
The fourth proportional to 87,039.96, 129,970.55 and 69,068.79 is: 103,135.49
Step by Step Solution
- Step 1: Write the proportion equation
87,039.96 : 129,970.55 = 69,068.79 : x - Step 2: Convert to fraction form
87,039.96/129,970.55 = 69,068.79/x - Step 3: Cross multiply
87,039.96x = 129,970.55 × 69,068.79 - Step 4: Simplify right side
87,039.96x = 8,976,908,624.13 - Step 5: Solve for x
x = 8,976,908,624.13/87,039.96 - Step 6: Final answer
x = 103,135.49
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.