Finding the Fourth Proportional to 97,987.32, 135,289.26 and 65,770.20
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Solution
The fourth proportional to 97,987.32, 135,289.26 and 65,770.20 is: 90,807.68
Step by Step Solution
- Step 1: Write the proportion equation
97,987.32 : 135,289.26 = 65,770.20 : x - Step 2: Convert to fraction form
97,987.32/135,289.26 = 65,770.20/x - Step 3: Cross multiply
97,987.32x = 135,289.26 × 65,770.20 - Step 4: Simplify right side
97,987.32x = 8,898,001,688.05 - Step 5: Solve for x
x = 8,898,001,688.05/97,987.32 - Step 6: Final answer
x = 90,807.68
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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.