Finding the Fourth Proportional to 105,430.45, 145,493.93 and 57,683.99
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Solution
The fourth proportional to 105,430.45, 145,493.93 and 57,683.99 is: 79,603.85
Step by Step Solution
- Step 1: Write the proportion equation
105,430.45 : 145,493.93 = 57,683.99 : x - Step 2: Convert to fraction form
105,430.45/145,493.93 = 57,683.99/x - Step 3: Cross multiply
105,430.45x = 145,493.93 × 57,683.99 - Step 4: Simplify right side
105,430.45x = 8,392,669,387.29 - Step 5: Solve for x
x = 8,392,669,387.29/105,430.45 - Step 6: Final answer
x = 79,603.85
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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.