Finding the Fourth Proportional to 93,679.76, 139,840.66 and 86,742.92
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Solution
The fourth proportional to 93,679.76, 139,840.66 and 86,742.92 is: 129,485.68
Step by Step Solution
- Step 1: Write the proportion equation
93,679.76 : 139,840.66 = 86,742.92 : x - Step 2: Convert to fraction form
93,679.76/139,840.66 = 86,742.92/x - Step 3: Cross multiply
93,679.76x = 139,840.66 × 86,742.92 - Step 4: Simplify right side
93,679.76x = 12,130,187,183.13 - Step 5: Solve for x
x = 12,130,187,183.13/93,679.76 - Step 6: Final answer
x = 129,485.68
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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.