Finding the Fourth Proportional to 78,206.18, 107,925.08 and 42,396.75
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Solution
The fourth proportional to 78,206.18, 107,925.08 and 42,396.75 is: 58,507.82
Step by Step Solution
- Step 1: Write the proportion equation
78,206.18 : 107,925.08 = 42,396.75 : x - Step 2: Convert to fraction form
78,206.18/107,925.08 = 42,396.75/x - Step 3: Cross multiply
78,206.18x = 107,925.08 × 42,396.75 - Step 4: Simplify right side
78,206.18x = 4,575,672,423.51 - Step 5: Solve for x
x = 4,575,672,423.51/78,206.18 - Step 6: Final answer
x = 58,507.82
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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.