Finding the Fourth Proportional to 103,130.79, 142,329.20 and 57,808.05
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Solution
The fourth proportional to 103,130.79, 142,329.20 and 57,808.05 is: 79,779.99
Step by Step Solution
- Step 1: Write the proportion equation
103,130.79 : 142,329.20 = 57,808.05 : x - Step 2: Convert to fraction form
103,130.79/142,329.20 = 57,808.05/x - Step 3: Cross multiply
103,130.79x = 142,329.20 × 57,808.05 - Step 4: Simplify right side
103,130.79x = 8,227,773,221.02 - Step 5: Solve for x
x = 8,227,773,221.02/103,130.79 - Step 6: Final answer
x = 79,779.99
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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.