Finding the Fourth Proportional to 100,980.74, 139,347.14 and 55,659.08
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Solution
The fourth proportional to 100,980.74, 139,347.14 and 55,659.08 is: 76,806.07
Step by Step Solution
- Step 1: Write the proportion equation
100,980.74 : 139,347.14 = 55,659.08 : x - Step 2: Convert to fraction form
100,980.74/139,347.14 = 55,659.08/x - Step 3: Cross multiply
100,980.74x = 139,347.14 × 55,659.08 - Step 4: Simplify right side
100,980.74x = 7,755,933,683.10 - Step 5: Solve for x
x = 7,755,933,683.10/100,980.74 - Step 6: Final answer
x = 76,806.07
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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.