Finding the Fourth Proportional to 78,723.18, 108,637.68 and 42,913.08
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Solution
The fourth proportional to 78,723.18, 108,637.68 and 42,913.08 is: 59,219.88
Step by Step Solution
- Step 1: Write the proportion equation
78,723.18 : 108,637.68 = 42,913.08 : x - Step 2: Convert to fraction form
78,723.18/108,637.68 = 42,913.08/x - Step 3: Cross multiply
78,723.18x = 108,637.68 × 42,913.08 - Step 4: Simplify right side
78,723.18x = 4,661,977,452.85 - Step 5: Solve for x
x = 4,661,977,452.85/78,723.18 - Step 6: Final answer
x = 59,219.88
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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.