Finding the Fourth Proportional to 100,588.18, 138,811.72 and 55,269.06
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Solution
The fourth proportional to 100,588.18, 138,811.72 and 55,269.06 is: 76,271.32
Step by Step Solution
- Step 1: Write the proportion equation
100,588.18 : 138,811.72 = 55,269.06 : x - Step 2: Convert to fraction form
100,588.18/138,811.72 = 55,269.06/x - Step 3: Cross multiply
100,588.18x = 138,811.72 × 55,269.06 - Step 4: Simplify right side
100,588.18x = 7,671,993,281.38 - Step 5: Solve for x
x = 7,671,993,281.38/100,588.18 - Step 6: Final answer
x = 76,271.32
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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.