Finding the Fourth Proportional to 138,242.42, 207,031.48 and 78,898.18
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Solution
The fourth proportional to 138,242.42, 207,031.48 and 78,898.18 is: 118,157.70
Step by Step Solution
- Step 1: Write the proportion equation
138,242.42 : 207,031.48 = 78,898.18 : x - Step 2: Convert to fraction form
138,242.42/207,031.48 = 78,898.18/x - Step 3: Cross multiply
138,242.42x = 207,031.48 × 78,898.18 - Step 4: Simplify right side
138,242.42x = 16,334,406,457.13 - Step 5: Solve for x
x = 16,334,406,457.13/138,242.42 - Step 6: Final answer
x = 118,157.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.